Bad service

I had a personal loan with Nedbank the last payment was less than R471.83 this was sometime late last year and I called their call Centre and spoke to one of the consultants to ask her if she could give me a settlement amount the lady put me on hold for quite some time must have been about 10 minutes she came back and told me that her supervisor said that I have to pay an additional R80 to close the account. I was livid I wanted to know why do I have to pay an R80 to close the account she couldn't explain to me. I sent two emails to the manager of the department for an explanation and to date nothing. I paid the amount that was outstanding and didnt settle the R80. Until recently I received a call from their Call Centre stating that they haven't received payment for two months and that the account is in arrears and it's approximately R7 or R800. I explained to the lady and she told me that it was for admin and interest fee and then told me that they going to hand me over to their legal department. I've never in my life heard that you have to pay to close an account