'Impossible' Heather Mills

Heather Mills' publicist Michele Elyzabeth has quit her job, declaring Heather "impossible" to work for.Michele - who has worked for Sir Paul McCartney's ex-wife for the past four years - claims a "heated argument" is to blame for her resignation.She said: "After working for Heather Mills for four years, I have decided to cease representing her. Since her divorce has become final, in my opinion, Heather has become an impossible person. "On Wednesday (23.07.08), we engaged in a heated argument during which she called me 'stupid'. I reminded her that she was not 'God' and she answered, 'I will never ever talk to you again'."Michele - who claims she is owed money by the charity campaigner - also admits she can now understand the public perception of Heather.She added to US TV show 'Extra': "I have been very patient in my dealings with Heather, however, I cannot take anymore. 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 has been reported about her."