DSTV pathetic service

I have 2 x easyview accounts and showmax, I never had a problem with payment but for the last 2 months dstv decide to just deduct a small amount from my account and then I get a sms to say that my line will de suspended if I do not make payment. I queried this end July, same thing happened this month. They cant give me an explanation how they get to the amount and best of all when I ask that management call me they tell me my details are not on the system. I ask, how do they send out a sms with my smartcard number if they dont have my phone number