Incorrect billng and pathetic service - AGAIN

After months of calls, fights, arguments, i thought my issues with multichoice we finally solved. my account is meant to be in credit of R1100, therefore i was not meant to be debited. however i was debited R849 on 1 Aug. when i call, wait for 15 mins - this agent Thabo hangs up on me. i call again, the agent then says my account is in credit for the amount, but he does not know why i was debited. i ask for an immediate refund of my credit and i was double- debited in error last month. however refunds take 40 days to be processed and i should go and stop the debit orders. i ask for a manager and he HANGS UP TOO! i am AGAIN out of pocket for 2 months in a row and no one cares or can do anything to help. i am sick and tired of complaining and the pathetic call centre who can do anything to assist! 40 days for a refund - when i have been billed incorrectly for 2 months. i have not heard of such a useless system. what disgusting, emabarrassing, pathethic excuse for service.