Incorrect billing to my account

I have never complained this much about a service in my life!! I had 2 dstv subscriptions under my account and ended up cancelling one of them because they continued to debit money from my account for a service that had never worked! after crediting me for the account, I work up 3 days later to an account that had more than trippled. I currently have one subscription under my account on compact and even though my subsription only comes up to R494, they debited R1150 from my account after they said they had fixed it. Im cutting ties with this agency now!!