Builders RCS not worth it

Run. I've been struggling with this business for more than 3 years now to correct my statement. It all started by them being unable to allocate my payments to my account. I have an account with a R3000 limit, all paid up but according to them, I'm in debt to the amount of R3800. Several phone calls, e-mails, in store visits, nothing solves the problem over the past 3 years. All supporting documents sent through to them, proof of payments etc. They simply refuse. Debt just adds up. Now it escalated to the point where I'm flagged on the credit bureaus due to non payment. I paid them too much. That's the only problem. 5 payments were'nt allocated, suddenly they found 3 of them, but this doesn't help because it's not getting deducted from my statement! I'm so fed up with these *********** people. They've handed my over to lawyers in April, same old story. Can't solve a thing. In the meantime, my credit score drops and drops. Is this fair?? All supporting documents were submitted. Nothing happens. What a mess.