Poor customer service

I am furious after the service I received when trying to get assistance from the Fnb call center ***). I had settled a temp loan that had been handed over to Farmacres,I settled the loan over a week ago but when I request a paid up letter I'm being sent from person to person.I called Fnb 3 times but they referred me to Farmacres,then farmacres reffered me back to Fnb,I've been calling since half 8 in the morning but still no settlement letter. To make things worse,I tried to dispute the short trem loan in question because I havent used their account in over 2 years,and still they were unable to help but instead they demanded payments from me.the only reason why I decided to pay the loan was because of the negative listing under my name. All I want is a simple paid up letter to submit to Transunion in order to update my profile.