TFG Debit order problems

I have an Sportscene/Foschini group account. When I switched banks from standard bank to fnb I gave them the new bank details for the debit order... Since I changed banks they have not taken 1 debit order and keep on blaming the bank but the bank has never had a request for the debit order... After two months of no debit orders I recieved a SMS that my account is in arrears and that they are reporting me and updating my credit score... I called the very friendly customer services and was told that it can take up to 48 hours but they will look into it and call or mail me back... 60 hours later and still no call or solution from them... Ive already settled the amount owed but the problem is my credit score !!! I dont need this in my life... Its your fault that my account is in arrears because you never contacted me to tell me that the debit order didnt go through and you still dont know why... Its not fair to touch my credit score for something I wasnt aware of...