Listed at credit bureaus by TFG's mistake

I called in the their customer service and spoke to 3 different agents. They were all rude and their help was that I'm the at fault. According to my understanding and the form you sign when opening an a staff account is that if you resign the company will deduct the balance that is left but they did not on my account and now I've only just find out that I'm listed at credit bereaus and they say it's my fault but I didn't get any notification that my staff account was not settled as per application form agreement. I would have gone and paid the balance because it was only R600+ .