Service Cancelled

I informed Cell C that I was not going to renew my contract and that my service should convert to pay as you go from the 20th of May. A couple of hours later, Cell C decided to terminate my service without notification. The sad reality is that I have 1 month left in the contract and now I have no service. I took the phone to the Canal Walk Cell C but they could not assist. They suspect that someone made an error and instead of loading the contract end date as May, may have done it as immediate. The reason I refused to engage Cell C going forward is because the network service has been shocking and they threw their hands up in the air and offered no solution. This is a complete breach of contract or incompetence. either way, it is inconveniennt.