Sky television received dozens of complaints from viewers demanding refunds, angry that the fight finished two rounds earlier than expected.
Fans paid a fee of $39.95 to watch Friday night's bout in Brisbane between Sonny Bill Williams and Francois Botha.
Sky's New Zealand spokeswoman Kirsty Way admitted many viewers were unhappy about the way the contest ended and some felt short-changed.
"We have had a few discussions with customers but we were the broadcaster for the event and not organising it or promoting it," Way said.
"The way the whole night pans out is out of our control and what we did do was broadcast the event in its entirety.