Cell C is taking funds after cancellation

I initially signed up for a contract in July. The salesman was suppose to call me after i recieve the sim for the t's &c's but failed to do so. He never even explained to me that the 40gb is not blocked and that you can go over the amount. After many attempt to get hold of him(calls he ignored and emails he never responded to) i was eventually billed a ridiculous amount. I got hold of a team leader and he agreed that it was their error and i decided to cancel. It was promised to me that no debit orders would be taken off and the contract would be cancelled. they even arranged for a courier to collect the ****le and sim. Since then they have been debiting my account with 2 separate amounts on a monthly basis. I have complained every month to sort this out. same story every time. They tell me it has been cancelled and they would not take off any debits. My case was apparently referred to the legal department and they would give me a call within 2 days. That was on the first of October. no one bothers to contact me or tell me what is going on. The salesman still ignores my calls. Worst service ever. All my incident reports Reference Number : ********** 773 Incident: 180 ********** 01 Incident: 181 ********** 58