MTN SP Bad service

I had a financial problem which let me to have arrears Of R385 (2years ago) which I settled in 2 months. I've been using the same contract ever since (even now). When I apply for anything even a cheque account it's gets declined on the reason that Mtn listed me on the credit bureau for an amount of R385 which happened 2 years back. I went into the branch I was told that they cannot help me, I have to call 808, I called 808 they told me it's a legal matter but I can't be transferred to legal they have to sent and email which they previously did but legal hasn't called me back. I later called the head office on ********** but I was told the same thing that they can't transfer me to legal I should call then on ********** 800 but the number doesn't work. I stressed due to I cannot apply for anything due this issue because it keeps on popping up as a reason to decline. What makes me more furious is when I call the service provider I'm told my account is up to date.