Price Lock System Migration Mess

I am on the Black Friday Price Lock package, which is supposed to be R749 pm. During September the debit order did not go through due to a problem with my bill. During the month DSTV disconnected me 3 times - According to various calls to the call centre I was promised each time that my bill will be sorted and that I won't be double billed during October - as they confirmed it was their fault. Guess what, my debit order for October whas R1300, not R749. To add to the displeasure, my DSTV was disconnected again today as they state that I owe them another R715, which is impossible. Apparently this is due to a system migration issue, but now the contact centre staff make promises they can't keep and I, as a customer, keeps getting disconnected. This is unacceptable, I can't do business like this and will end my relationship with DSTV once my Price Lock Contract expires.