Contract still not cancelled

I have requested that my contract be cancelled as it came to an end of its 24 Months. I initiated the process at the Kenilworth Center branch a month before the time. I then followed up, as I have not heard anything regarding the cancellation of the contract. I called the call center on 4 occasions, each time nobody could help me. I have emailed the cancellations department as well and still no feedback. I gave my contact numbers, but instead the call center agents added an unknown number to my profile, I have no clue where they got that number from. The contract I am cancelling is for a tablet, which is a data contract. I do not use the device as cellphone, hence I will not be reachable on that number. I have exhausted all my options. I will have to take this further and in addition cancel the debit order with the bank myself. I refuse to be billed for another month after October as I no longer require the contract.<br> My case number : *** / ***