*********** workers at multichoice

it is now almost 4 month I have been battling to get our multi choice account sorted out. we change banking detail, send al the correct paperwork 4 times, everytime it goes missing and they ask you to do it again, but the account detail was changed which means they did get the relevant document but did not do the full update on the system,, the bank account details is correct but still on the wrong deduction date. they told me I was in a credit, and then al of a sudden the service was disconnected and I owed R3100, which I paid, now again I got a message saying I owe R1700.. what the hell. can some one please explain to me what is going on with my account.