Greenpeace has apologised to Nigel Latta after he accused the organisation of harassing him with cold-calls.
The psychologist and documentary-maker said he received numerous "spam calls" from the New Zealand arm of the environmental organisation after he signed a petition in support of a Greenpeace campaign.
"Why, if you sign a petition, does @GreenpeaceNZ then constantly harass you with spam calls?" he wrote on Twitter.
"Multiple spam calls. Then you block … them and they call from a different number.
"Yet another example of an organisation that seems to have lost sight of its mission."