Complaint of terrible customer service and lack of query resolution

I have had the most unpleasant and costly experience with dstv-multichoice. In April they sent me a statement stating that I had to pay about R25 for that month. This was way low than the normal R549 I pay monthly so I called the call centre to confirm and they confirmed this. Months went by and then my nightmare began on the 13th of June 2018. My services were disconnected due to non payment, but that wasn't correct as I had been paying my monthly premium. I called the call centre and was told R549 had been reversed and I advised the agent that I had not received any funds from dstv. She did however reconnect me after being on the phone for almost half an hour. 5 days later I was disconnected again, called dstv again and was told dstv duplicated a payment in April hence my statement reflected R25. I told the agent I did not have R1000 to pay dstv , hence I'm on compact and besides this was no fault of mine. He advised I could make a payment arrangement, I agreed on paying R656 over 7 months and he said someone from Finance was going to call me (I've since never received a call from them). This continued where my services are disconnected every 5 days and I have to call and explain my frustration from the beginning to each new agent I speak to. I also spoke to a lady called Jabulile Thlapane who PROMISED to personally escalate this matter to finance and call me back (she has never called me). I would like dstv to please sort this out very very urgently, they created this problem and please REIMBURSE me for all the airtime I've used to call the call centre when my services are disconnected.