Billed even when i cancelled contract

<p>I've sent Telkmo cancellation department forms also with my ID copy last year 5th December 2016, today the 3rd January 2017 getting an invoice Account ********** 41, invoice no ********** 837. I confirmed last year September with their consultants that i am not renewing a contract but i am still being billed for contract that have expired. Telkom Mobile your Service is extremely terrible and now i regret why i had a contract with you as your Service is unacceptable can't allow this to happen. Can you also Advise when are you going to pay back the money you have been deducting from my account!!</p>