His attempt to get rid of his biggest competitor backfired, leadingto his own teammate - former All Black Zac Guildford - being eliminated instead, prompting some to ask if he'd purposefully got rid of Zac, as another strong competitor.
Unhappy viewers have taken to Twitter to express their frustration at Wallace's gameplay.
#CelebrityTreasureIsland Sam Wallace not coming across very well at this stage. Making all the wrong moves and got rid of one the strongest playes already in Zac Guilford. Would have been great to see more of Zac to understsnd him more. Sam took that away from NZers
But Wallace has taken to Instagram to hit back, saying: "Before anyone judges me for the way I'm playing @celebritytreasureisland know what I'm playing for!"
He shared a photo of his nephew Beau Charlie in hospital following heart surgery.
The Hits radio host is competing on Treasure Island to win $100,000 for his charity of choice, The Starship Foundation after his nephew had to undergo two heart surgeries at Starship Hospital.
In an earlier Instagram post, Wallace said he was "happy to be a villain fighting for the lives of kids."
