Closed Price Lock Acc messing up my DSTV acc

My name is Ephraim Mafuwane, account number ********** 1 cellphone number ********** 650. I had a price lock which came with an explorer. I settled the account and received confirmation that the account was settled and closed. However I will constant receive an error 129 something which made it impossible for me to check my recording, playbacks, pause etc. I constantly had to phone Multichoice for the error to be fixed which is now costly for me. From there i started receiving smses saying Im owing and my services will be terminated. I found this to be strange since I pay by debit. I called again to find out what was the problem. I was told that R481 has been parked in the price lock account which is the reason why Im owing.I have been calling three times a week to get the accounts sorted out and almost once a week to have my explorer functionality reconnected. It is costly, I can feel the cost of calling multi choice on my cellphone as every time i call i must close to 55 rand airtime. Every time i call the agents tell me that they will escalate the matter to have the amount transferred back into my main account and also close the price lock account and nothing is happening