However I hav a letter from them that shows that I was covered. They claim that I did not pay my payment and they canceled my insurance. I never received a letter from them saying it was canceled. Also, I payed my insurance with a money order, and have no proof that I paid them since I sent it in the mail.
It is not just a letter it is my policy statement from them showing the start and end date of my coverage.
How exactly does a letter show that you are covered at the time of the loss? I don’t think you are interpreting that "letter" correctly.
You don’t HAVE to receive a letter saying your policy is cancelled. All they have to do, is ATTEMPT to notify you. Easily 25% of the people who’s policies get cancelled for nonpayment, in my experience, claim that they didn’t receive a bill, or a cancellation notice. Some of them moved and left no forwarding address. That’s why, the insurance company only has to ATTEMPT to notify you. Otherwise, people would get free insurance, by throwing away the letters, unopened!
Your only recourse is to file a complaint with your state insurance commissioner – but most likely, if your money order was lost in the mail, or not received by the cancellation date, you really are cancelled. Companies don’t have to honor a postmark date. And they don’t have to reinstate you, if your policy has gone into cancellation status.