Roxy revealed she doesn't consider Candice a friend anymore after the intense physical fight.
While Candice threw a number of punches, Roxy refused to hit back due to their longstanding friendship.
"You know what? Is [Candice] really my friend anymore? No," Roxy said on The Kyle and Jackie O Show.
"You know why I never hit back? She's my mate and I'm not going to smack [her] in the face for other people's entertainment."
"You wouldn't continue punching when the person – me – turns their back and continue punching them in the back of the head. In boxing, that's totally not allowed. The reality is, I can't punch my then-friend in the face for people's entertainment."
She continued, "You look back and go, 'F**k, I should have whacked her one,' but you know what? I'm bigger than that and I've got respect for other people."
Roxy explained that she reached out to Candice after filming the show in August in the hopes of repairing the friendship, however, instead of moving on from the fight, Candice fired Roxy as her manager.
"No, she sacked me instead," Roxy said, "People will always let you down. I believe after what I did for Candice that it was a real smack in the face, pardon the pun."
Candice is now repped by The Ministry of Talent's main competitor The Society Agency.
While Roxy has unfollowed Candice, the former ironwoman still follows the PR queen.
Roxy famously supported Candice when her husband David Warner was at the centre of Cricket Australia's ball-tampering scandal.
At the time, Roxy told The Australian, "Candice is a dear friend, thus my support, but I am not their PR."
"I will continue to be a support to the family as they deserve and will not participate in giving air to this pathetic 'kick-them-while-they-are-down' mentality."
When Candice suffered a miscarriage a week later, Roxy once again stood up for her friend.
"For a woman to have a miscarriage, it's very, very devastating and I know for Candice and David, they had been trying for some time," she told Daily Mail.
Roxy also revealed in the radio interview that she felt as though she was unfairly targeted in the opening stunt with the helicopter where each contestant fell backwards into a lake.
She claimed the helicopter was at "double the height" of everyone else's, "That was when I basically buggered myself – the impact of hitting that water. Then we had to swim, and what you don’t see on TV was the swim was a really long way – about 10 Olympic pool laps to swim (back to shore)."
"I’ve had cancer. I don’t want to be in a position where I put my health at risk any more. I fractured my pelvis and hip six weeks before filming – I just couldn’t do it."
Roxy decided the best thing to do was to put her health first and leave the show six hours into filming.