Multichoice - Billing me after cancellation of subscription and the insurance

I have been a muiltichoice customer for sometime now. On the third week of May I contacted them and informed them, that I will no longer be requiring their services, I would like to be disconnected at month end and consequently I was not expecting any further debit orders. I also cancelled the insurance part of the deal as well.

Now, I am getting irritating calls and text messages and I also cancelled on the insurance side as well. Every time I call the call center (insurance +Muiltichoice itself) I am told "Ms. We can see that you cancelled on time BUT there has been a delay on our side to process, we will rectify it and don`t".

The problem still on going. I have a great credit record and do not want it to be tempered by incompetency and ignorance.