Worst service ever experienced with Cell C!

The worst service I have experienced, utterly infuriating to say the least. I have been in a non-stop battle with Cell C for months. Initially they messed up the contact transfer, forcing me to contact them numerous times without success, only to them mess up the upgrade as well. Eventually after that was sorted out (which took months). I now have constant issues with my debit orders, which were verified with Debi Check as agreed upon. September the debit order was not presented, only to be double debited in October, which they promised would not be the case. Now again November the Debit order was not presented, upon phoning them immediately I was advised to go pay in store! No assistance, no effort to fix their issue. It is expected of the customer to take on the burden of correcting their issues. I am so tired of the lack of service and now stuck with a service provider that cannot or rather will not provide the service paid for, for the remainder of the contact.