The two TV stars were brought face to face on Loose Women last Wednesday in a bid to end their 'feud' from Celebrity Big Brother.
And there was no end to their bad blood as instead their attempts to to sort out their differences ended in it all kicking off between the pair live on TV.
Kim ended up storming off the show, as viewers accused Coleen, sister Linda and their co-hosts of 'ganging up' on her.
The scenes prompted a total of 3,297 complaints to TV watchdog Ofcom, while 16,000 signed a petition to have Coleen sacked from Loose Women.
Appearing on This Morning today, Coleen said: "I honestly don’t know what to say. If I could go back in time, I would change the whole thing. It was never meant to be like that, I thought Kim was coming on to make amends.
"It didn’t go that way obviously from the moment she came out. It was genuinely shocking for the both of us. I didn't want anyone to be distressed. It’s been the worst week of my life."
Coleen sobbed: "I don't know what I did wrong. I didn’t say anything in that interview because she needs help and I feel sorry for her.
"But to be called a bully and to have messages like 'Why can’t you die like your sister', 'Why can’t you have cancer like your sister?' They send me these revolting messages."
Coleen went to reveal she was considering 'quitting showbiz' for good.
She said: "I’ve called my managers, my family saying I don't want to do it anymore. I think I’m strong I’ve been in it years and I’ve dealt with trolls before.
"It's revolting you know and I wouldn't wish it on anyone. I would never wish harm on Kim. I don't hate Kim and I would never set out to bully her."
She concluded: "I've had a week of it. I’m doing a job I really love to do and a campaign to get me fired. It's been a really hard week. I feel such an idiot [about crying].
"I apologise to anyone who were offended by it. It’s been horrendous."
A spokesperson for Loose Women said of the incident last week: "Kim agreed to come onto the panel today at the invitation of the producers on the understanding it was for a reconciliation with Coleen.
"Kim becoming upset was never the intention and the panel did endeavour to comfort her. She was offered counselling after the show, which she declined."
Loose Women airs weekdays at 12:30PM on ITV.