Call center are useless

I've been having countless problems with DSTV to cancel my DSTV account. I started phoning in March to cancel the account. Every time they have a different story for me to settle the account and cancel it. I phoned 5 times already. Now they tell me to phone again in the new month to cancel my subscription. But I did phone on 24 April to cancel it. Now they want to deducted another R949 for May. This is unacceptable and I am not happy with the service that I receive from the call center. Before you phone me listen to the 5 calls on my profile. Do your investigation and then phone me with a solution.