abusing customers payments and refusing to allow customers to cancel service.

after not using dstv for several years I suddenly got a call saying I owed them money. As I had to pay in advance to use DSTV previously I did not see how that was possible. The consultant said they would send me the account via email. When this didn't happen, I downloaded their app and paid the account, which was now much more, myselr. Because of the counterintuitive payment system I overpaid by R818. I then could find no way on the site, app or whatsapp service to have my account terminated. Dstv, I want my money back and my account closed or I will escalate this.