Price Lock? Run!

Received a call offering the Price Lock option and as the monthly fee is slightly lower, I accepted the offer. The decoder was duly delivered a day or so later. When the young man phoned me, I asked him to change my debit order to the 2nd day of each month, from around the 24th. I phoned an installer who came to fit the new dish and attempted to get everything to work. Then the issues started. E16, i.e. account not paid. Trying the call centre is like ****ing against thunder. You can't speak to a human being and when I eventually managed to, I was told to send an sms. Eventually I found an email address and things started to happen. I was informed that because I changed my debit order date, I had to pay R646-67 and then the credit I'd have on my account will activate. I grudgingly did this only for a debit order of R904, not R799 as was supposed to be, to run on 2/3. I've tried emailing them, but to no avail. Let's see if this elicits a response.