They said: "Roxanne has chose to leave the Big Brother House".
Roxanne said she would leave the house on last night's live CBB show when she was told she must choose between nominated housemates Ben Jardine and Jermaine Pennant. "The remaining housemates have been informed", a Celebrity Big Brother spokesperson said, adding there would be no further comment.
Media watchdog OFCOM received more than 11-thousand complaints thought to be about Pallett's reaction, and is deciding whether to investigate.
The incident allegedly took place in the kitchen of the Big Brother house.
But Thomas said there was no "malice" in what happened, with some viewers arguing it was merely play-fighting.
He said: "I want you to know from the bottom of my heart I was showing my affection".
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During Thursday's show Thomas was seen approaching Pallett in the kitchen before appearing to use his fist to make contact with her body.
"Maybe it came across the wrong way". A boy has punched me repeatedly, unprovoked and deliberately punched me.
Roxanne - clearly taken aback at hearing the chant, said: "I loved my chant outside".
"I'm in shock, I went from upset to angry".
Pallett is the second star from this year's series to leave without being evicted, following the removal of Brazilian reality star Rodrigo Alves.
She said to Big Brother: "I'm going home, I need out". All I say, in my life, things have happened to my family, you've seen me, I like to have a little box.
It was confirmed that the former Emmerdale actress had quit Celebrity Big Brother.