Arrears account

Worst service i have ever had! We have an arrears account that is messing up my husband's credit record, all because of the *********** people working there! I am considering legal action! Last year Aug we changed jobs and our pay date moved, i sent numerous emails and spoke to numerous consultants to move the dt order. I paid the account every month via eft, i was never informed that i am in arrears because they tried to take dt orders on different occasions before the arranged date and even after eft is allready done, for every time they put a pennalty. By December my account was swithed off and I tried everything to sort it out, even went to the branch. No help, no solution! By March the cancelled my contact, by April it was handed over. I have been struggling ever since to find out who to speak to, to resolve the issue. The idiots can't even tell me to whom it was handed over to and where to pay the money to get it of my husband's name!!!!!!!!!!!