Vodacom frustrations

I paid R13673 to settle all my Vodacom contracts over a year ago. This week I go to finance a vehicle and the banks don't want to approve finance because my credit record shows that I'm paying Vodacom R13673 per month. I phoned customer care last Thursday. I was promised a settlement letter within 24 hours. I received nothing, neither did I get any other correspondence from Vodacom. Today, Monday, I phone vodacom back. They tell me that their was a service pending on my name so they could not issue that letter. Service pending from over a year ago????? Customer care had absolutely no answers for me. I asked what service was pending, the consultant didn't know. I am extremely frustrated. Vodacom is preventing me from purchasing a vehicle. I will definitely take this up legally if this letter isn't sent to me by tomorrow and Vodacom can pay for a vehicle for me.