Im cancelling all my contracts with mtn ***

MTN has to be the worst service provider, no one knows what they are doing and customer care is not caring for their customers at all. I have soo many reference numbers I cant even put all of them. I took a router in addition to the two contracts I already have and the router I took through MTN direct, I was assisted my Ismail, I had issues with getting my router delivered, I struggled for like a week calling MTN and no one cared to assist, finally the router was delivered and to my surprise it was not working”how great” I called mtn and no one was able to help me until I decided to take it to mtn southgate mall- and received an IRMS number, the gentleman at the store told me to call retentions to cancel, I called retentions and retentions says they dont do cancellations of free to use devices I must speak to point of sale, I then called mtn direct only to be told to speak to retentions, now its a whole running around and back and forth trying to get this thing cancelled cos they keep on taking money from my account and whats even more frustrating is that I just spoke to thandekile at customer care to change my payment method back to cash cos ive beeen paying via eft since ive had my accounts, she tells me that the new rule is that its a must for a client to pay via debit order and thats just bs. I have been promised call backs from customer care and mtn direct but instead im the one who is bysy running around trying to get this sorted mtn is a shame Im cancelling all my contracts