Nextel Insurence

Ive had nextel for a year, Ive lost/damaged my phone more than 3 times so asurion the insurance company discontinued my insurance on 10/02/2007, but nextel billed me until 12/30/2007 until i noticed their mistake and informed them, but they refuse to return my money paid for Sept,Oct,Nov for which i was receiving no insurance service bet paying for it, and when i called customer service the supervisor PEGGY very rude, has a disgusting attitude and refused the return my money claiming it would be insurance fraud, and finally when i asked for the cancellation dept hung up on me!