Pathetic service

I have been trying for more than 2 weeks to sort out my account. We were given a new dstv decoder and were told it is under price lock with a monthly fee of R959.00 per month free installation. The installer then arrived wanting to charge R450.00 to install. I then told him to get out and I phone dstv to come and fetch their device and leave us as we were. I have not heard from them until now. I have tried calling them and if they answer I get told they will phone me back to sort this out which still has not happened. I have been phoning them daily not just waiting for 20min plus to speak to someone but then getting told that they will call back. My account was now debited twice this month and still no word from them. I am really fed up now.