I keep paying for their incompetence!?

I have tried repeatedly,unsuccessfully, to cancel a month-to-month data deal with them. I went into the store at Nicolway to cancel a data contract, filled in the cancellation request form and was told it is a 30 day notice period. The next month my account was debited for the following month. I queried it, they said a cancellation was never sent and I had to do it all again. Eventually a family member took over the account as it seemed easier than cancelling. I had the account continue but then the sim was ******. Instead of a sim swop I again requested the account and sim be cancelled only to have them cancel my cell contract instead of the data account that I had requested. The people in store can not help, they can only call the same call centre as the customers and there is no one at the customer call centre able to help. We were told to do another cancellation request with another 30 day notice!?!? In the meantime I have no cell contract and have to pay another month subscription for a data contract I cancelled and can not use because of their cancellation department's incompetence and their lack of infrastructure to solve problems internally. So sorry I signed up with Telkom