"The treatment she received was not human," a source within the facility familiar with its operations and the woman's situation, told Māori TV.
The source says Serco, the private operator of the centre, is failing as it relates to tackling mental illness among detainees.
"With mental health concerns, basically it's the same approach for everyone. Heavily sedate them so they shut up."
Ian Rintoul of the Refugee Action Coalition, an advocacy group for detainees told Whakaata Māori (Māori TV) that fellow inmates and the woman herself had pleaded with Serco to get her help.
"Both she and a few other detainees had told Serco and Border Force, she needed help and should not be in detention. Her mental distress was very obvious," Rintoul said.
Friends today remembered the woman as "gorgeous, with a beautiful wairua".
"I was concerned about her, about her mental health, especially in that place," one said.
On Sunday, the day after the woman's death, detainees told The Guardian, the woman had been battling to get earlier access to her mental health medication in recent days.
"She told me that she needs to have some medication at 8am in the morning but they'd give her medication like at 11am or 11.30am. And that makes her feel so bad," one detainee said.
The woman was found dead on Saturday.
"She was telling us last night, 'I want my story to be heard. I want the people to know what happened to me. I want to tell the people what these detention centres do to people'," a detainee recalled.
One of the 'final straws' was likely that the woman had adopted one of the stray cats known for roaming the facility, to keep her company, but guards raided her cell just hours before she died, and took the animal.
"She was pretty obsessive, attached, and they knew that. They broke her spirit," a detainee said.
The fellow deportees also say the woman had been trying for some time to get in touch with her two boys, one of whom resides in Sydney, but she believed guards were preventing her from doing so.
Māori TV understands the Australian Border Force took more than 12 hours to get in touch with the woman's family after her death.
Rintoul says the Christchurch women's death follows the suspected suicide of an Iranian asylum seeker in March, along with a series of suicide attempts from other detainees at the centre.
Last month Māori Television broadcast footage of detainees at a facility on Christmas Island, northwest of Australia, gushing blood from a series of wounds they say were inflicted by guards, who beat them with batons and steel pipes while protesting conditions at the detention facility.
Aotearoa's Ministry for Foreign Affairs and Trade said last night it had yet to be notified of a death of a New Zealand woman in an Australian detention centre.
The Christchurch woman's death comes just days after a change of government in Australia signalled there might be a recalibration of the country's deportation policy.
Australia's new Labor Prime Minister Anthony Albanese has signalled the controversial 501 programme will continue, however he's also hinted there might be more consideration for the length of time someone has resided in Australia, and if they have any ties to Aotearoa.
The 501 deportations disproportionately affect Māori and Prime Minister Jacinda Ardern welcomed potential reforms to them during her weekly post-Cabinet press conference on Monday.
"We accept because we do it too, circumstances under which people will be deported… We have always reserved the right for New Zealand to do that." Ardern said.
"The area we have had grievance is where individuals are being deported who have little or no connection to New Zealand.
"I will be utterly consistent no matter whom the leader is in Australia with raising that grievance." Ardern added.
Māori Television has contacted Australia's Department of Home Affairs. It is yet to confirm the death of a New Zealander in its custody. It has not responded to Māori Television's request for comment.
SUICIDE AND DEPRESSION
Where to get help:
•
Lifeline:
0800 543 354 (available 24/7)
•
Suicide Crisis Helpline:
0508 828 865 (0508 TAUTOKO) (available 24/7)
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Youthline:
0800 376 633 or text 234 (available 24/7)
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Kidsline:
0800 543 754 (available 24/7)
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Whatsup:
0800 942 8787 (12pm to 11pm)
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Depression helpline:
0800 111 757 or text 4202 (available 24/7)
•
Anxiety helpline:
0800 269 4389 (0800 ANXIETY) (available 24/7)
•
Rainbow Youth:
(09) 376 4155
If it is an emergency and you feel like you or someone else is at risk, call 111.