Heather Mills Branded a "Mental Maniac" by Former Publicist

Paul McCartney's ex-wife Heather Mills has been branded a "mental maniac" by her former publicist, Michele Elyzabeth.

Michele says the former glamor model -- who earlier this year walked away with a $48.6m divorce settlement from the former Beatle -- owes her $100,000 in unpaid fees and that the two had their falling out Thursday when Mills accused Elyzabeth of telling reporters she would soon be writing a tell-all.

Elyzabeth tells the New York Post newspaper, "She was screaming and yelling, 'Is it true that you're writing a book about me?' I told her that it wasn't true, and she went bonkers.

"She was screaming so loud, she told whoever she was with to leave the room. She was yelling, 'I am tired of you, you're so stupid! You're so unprofessional.'

"I said, 'Who do you think you are with the way you behave - God?' Then she took it to another level. She was furious, fuming.

"She said, 'How dare you call me that?' I told her I was sick of her outbursts. I said, 'You have a couple of dollars now and think you are somebody?' "

Elyzabeth -- who has previously made Web videos defending Mills -- then told Heather she was quitting. "She told me she never wanted to speak to me again, and I said the same," Elyzabeth relates. She says Mills hasn't paid her for the last three of the four years she worked for her, and now owes her more than $100,000.

"I didn't see a dime," Elyzabeth said. "She's so cheap . . . I think she tells false stories and then believes them herself.

"One day she is sweet, one day she's not, and there's no reason for any of it. I protected her when I knew I was dealing with someone who was unstable. But now I believe everything the British press has written about her."