Poor service

I’m so unhappy with their service,I canceled my dstv account in 2019 after I was told that my account was in arrears and should I want to cancel it I need to pay the arrears because it’s still active on their side.I did just that and last month when I wanted to active a new account I was told I need to pay the arrears and I explained to the lady that it was done in 2019 already and the bill came end of June with a balance of 900 and I paid it not knowing it was for 2 accounts.and when I checked this morning I have to pay R1138. So I decided to query the amount and I was told I have 2 accounts under my name and I had to explain to the lady again.she told me she will cancel it again since it was still active on their side,when I asked her what’s gonna happen to the amount I paid last month she told me it went to the decorder