Bankmed PAIN

In September last year I left Bankmed as a member. I was not aware that there was R2000 outstanding which, when I was made aware of this, I made a payment arrangement the details of which I have proof of on email. The agreement was to pay R500 per month x 4 months in order to pay of the balance. Bankmed subsequently did not honour the agreement . When I discovered that it had not been deducted as agreed I paid Bankmed immediately and sent the proof of payment. Today I have been called by ITCBA and a very rude debt collector called Leanne Williams insisting that I pay the debt collection fees and the outstanding amount and that this is now R2,500! I have been trying to send the proof of payment to ICTBA but every email address they have given bounces back and now I have had to call their call centre at my own cost to be told an incorrect email address once more. I don't see why I should pay debt collection fees and be listed on ITC when I have already paid and the original mix up was due to Bankmeds bad administration practices anyway! Absolutely disgusting attempt to make money out of people which is what it looks like but it is probably down to sheer incompetence actually.