If you have to ditch your loudmouth celebrity client with whom you've represented through her messy divorce to a beloved pop icon because she's just too freaking much, what's the best way to do it?

By issuing one last press release on behalf of your client — about why you're quitting.

That's how Heather Mills' rep Michele Elyzabeth (who also reps Christian Audigier) just did it. Buzzwords: "Impossible person," "heated argment," "I cannot take anymore."

The activist’s U.S. rep quit, but rather than keep the matter quiet, she released a statement calling the former Beatle wife, “impossible.”

“After working for Heather Mills for the past four years, I have decided to cease representing her. Since her divorce has become final, in my opinion, Heather has become an impossible person,” rep Michele Elyzabeth said in a statement released to the media.

Elyzabeth claims Mills called her names during a conversation on Wednesday.

“Yesterday, we engaged in a heated argument during which she called me ‘stupid.’” Elyzabeth’s statement continued. “I reminded her that she was not ‘God’ and she answered, ‘I will never ever talk to you again.’”

Elyzabeth said this incident was the final straw in their working relationship.

“I have been very patient in my dealings with Heather, however, I cannot take any more,” Elyzabeth wrote. “I have given her substantial unpaid time and attention. I am owed money. I refuse to be subjected to her outbursts. On reflection and given the way I have been treated, I now have sympathy with much of what the British Press has reported about her.”

[Access Hollywood]