Poor service , still no paid up letter after begging for months

I took out a Capfin loan then settled the full outstanding amount months ago. I sent proof of payment and requested for a paid up letter many times , many phone calls , emails etc yet i am still waiting .The worst is it still reflects on the credit burau as not paid up, this is causing difficulties with my bond application. i am so disgusted and upset that no one is reverting back to me nor taking responsibility to update the credit burau and send me my paid up letter. Do you guys think it is right to play with peoples lives like this , we living in a stressful world and yet you guys feel you have the right to add to it .