The singer insisted that footage which appeared to show her giving "dirty looks" to fellow contestant Mica Paris had been manipulated by the programme's editors.
Maffia also accused show chiefs of encouraging her to act "cold" towards the other participants when the cameras are rolling.
She complained: "I know that they will edit it to look dramatic. But I didn't think they would make me out to be a bitch when I'm not."
The programme follows celebrity contestants as they work for a real-life airline. It airs on Tuesday nights at 9pm on ITV2.