Mr Price doesn't want to close my account

On 31 October I went into the store to close my account. I paid every last cent that I owed. The sales lady said they would phone me the next day to ask why I wanted to close the account and to confirm that it was closed. They still have not phoned. I have sent 3 emails asking confirmation that my account was closed. Still no response. And then they sent me a bill for November after several requests to close my account! Your communication leaves much to be desired!!! I consider my account closed and I will not pay the bill you sent me AFTER I closed it!!!