Poor customer service

I have been trying to close my dstv account and all the ir call centre agents are not helping me, i paid the arrears amount and before that i called and i was told that i must pay a certain amount i did, and now i cant close the account at at the same time its not active. I dont know what i must do now, all i need is their stupid acclunt closed and to get a paid up letter for my account so that i can clear my credit record