Dstv service suspended even thou I paid in time,reason is that my payment could not be found????

Hi I have been a customer of multi choice for couple of years now. I have been using EFT from my FNB bank account to pay for their service.All of a sudden my service got suspended even thou I have paid them on the 2nd of April 2019 for their April services and again on the 30th of April 2019 (which was for their May 2019). to my surprised they are telling me that they did not receive the payment done on the 30th of April, even thou the method of payment was the same as the one done on the 2nd of April. They requested a proof of payment to be sent to ********** which i did and it was received and my services were re-activated. that was on 6th of May 2019. today on the 12th of May, the services were disconnected again with outstanding bill of R516 (which include re-activation fee of R50 and other unknown charges to me). I called the dstv contact centre again to check with them. no definite answer is forthcoming...I am on the verge of cancelling their subscription and be free from all this nonsense... I don't deserve to be treated like this while paying for their services!!!