Account billed in error

Called Multichoice on the 19/01/16 spoke to Mojalefa Motlhakoane who advised me that i have two decoder instead of one, he said he will transfer funds to the correct decoder and cancel the other of which he did confirm it's cancelled. Advised Multichoice to debit the account on the 21st of each month, of which debit order was suppose to run on the 21/01/16, then called on the 20/01/16 as i had credit from the other decoder that was moved in order for the debit order not to run. Agent advised me on the 20/01/16 that debit oder won't run as i have credit, i'm only outstanding with + - R10.00 of which it will be debited in February. On the 21/01/16 received an sms advising that i don't have sufficient funds on the account, how cause according to me i was not suppose to pay hence i didn't have funds. I'm hurt because that account is my husbands account of which we married in COP meaning it affects me also that we can't handle our accounts well. I work for the Bank and i'm hurt and disappointed as i've been dealing with them from last year. I need someone to call me urgently as i'm thinking of taking this far. When i apply for credit it will show that debit order once rejected. <br>