The campmates took part in a Love Island themed trial at the weekend to try and win roast dinners for each of them.
However, one challenge in particular left viewers infuriated as they claimed it was "impossible" for James Haskell and Roman Kemp to do.
They had to try and unscrew three stars in the blue boxes, which were on James' side and filled with a crab, spiders and cockroaches, and move it to the corresponding yellow box on Roman's side, which were also filled with critters, in just 90 seconds.
The pair didn't manage to complete the trial, meaning Ian Wright, Cliff Parisi and Andy Whyment weren't going to be getting their roasts.
Viewers slammed the show and accused it of being a "fix" - something Ant and Dec hit back at saying the "stand ins did it when we tested it".
During Monday night's episode, the duo mocked viewers over their outrage.
— antanddec (@antanddec) November 24, 2019
As they introduced a segment in which Kate Garraway, Myles Stephenson, Nadine Coyle and Andy Whyment were taking on a challenge to win care packages for the group, the pair made a joke about the backlash.
Ant said: "James has bean trouble in camp," to which Dec cut in: "Yes, he has! Did you hear the way he had a go at me yesterday at the live trial?" referring to when James snapped at him over the challenge.
"It's not my fault he couldn't get his big sausage fingers to unscrew the star."
Ant told his co-star: "No, James has bean trouble. Trouble with beans," to which Dec replied: "Ah well beans do go well with sausages don't they?"
Moving on, Ant told viewers: "Right let's go back to yesterday morning and the start of a mission that would be barely possible to complete."
Dec continued: "If only there was an expression to sum up a mission like that... a difficult mission you know something that was unlikely," as the Mission Impossible theme song started playing.
It's not my fault he couldn't get his big sausage fingers to unscrew the star.
Dec then quipped: "I give up... it's impossible," as the crew burst into laughter.
It comes after Ofcom revealed it had received 48 complaints over the trial.
I'm A Celebrity continues tonight at 9pm on ITV.
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