Unable to fix problems with accounts

I pay my dstv account annually and my last payment was made end of March 2017, and I have confirmed with them: next payment is due in March 2018. Suddenly early September I have started receiving sms messages saying that my account is in arrears. I phoned the call centre twice and they promised me that the issue was resolved and my viewing will not be interrupted. Two weeks later I received another sms saying that my dstv viewing has been suspended. I phoned again, they enabled my dstv viewing and escalated the issue - saying I will receive feedback within 48 hours. A week later, no feedback and my viewing suspended again. Phoned again, they enable my viewing again, saying I will receive feedback and confirmation on the same day that the issue is fixed. Well it is 2 days later, still no feedback, and sms that say my viewing will be suspended again... I HAVE PAID FOR A YEAR OF VIEWING, NOW THEY DISCONNECT IT AFTER 6 MONTHS! PAY BACK MY MONEY!