Failure to cancel my contract

I submitted a request in January to cancel a month to month contract, but I'm still receiving invoices and I've not been contacted by any department regarding my cancellation despite receiving an automated email that this would happen. <br> <br> I tried to cancel this contract in store the first time, but just got handed a paper that I needed to scan and email. I'm going to cancel this debit order at the bank. I refuse to pay for something that I'm no longer using and that I've requested to be cancelled.