Assuming your contract allowed cancellation by fax, what happened when you got the latest notices and wrote them and provided proof of the cancellation. That likely would have resolved things. If not, see a lawyer and bring your paperwork to him.
Assuming your contract allowed cancellation by fax, what happened when you got the latest notices and wrote them and provided proof of the cancellation. That likely would have resolved things. If not, see a lawyer and bring your paperwork to him.