Very unhappy user

Good day, I would just like to lodge a complaint. I app**** for a promotion that DSTV was doing on 20 March 2019. The consultant gave me a pro-rata amount for March. On the 21st I went to pay this, but the system showed a much higher amount so I did not pay it then. I phoned the customer care line and the voice prompt told me the same amount, but said that it is only due on the 2nd of May. I did not recieve any reminder messages on my phone or decoder for payment on the 1st of April as I usually do, so I was under the impression that the due date was the 2nd of May as the voice prompt informed me. Yesterday morning, 10 April, I got an sms saying that my account has been suspended due to non payment. I phoned the call centre again and explained the situation and though the consultant was "very sorry for what happened" she could not tell me where the mistake came in or how the problem was going to be resolved. Later I phoned in again and this time they were again very apologetic and the consultant was going to send a message to the billings department who then in turn was going to phone me within 2 hours. I still have not recieved a call from them and my service is still suspended. I would really like this matter resolved as quickly as possible. Kind Regards, Mareike