Disgusting Attitude and Behaviour

On the 19/11/2014 I had to visit Olivedale Clinic as my sister became unwell whilst she was visiting from the UK. I must point out that the service by medical staff was excellent. However, that's where it stops. We went to reception advised the staff my sister was covered by travel insurance with one of the largest banks in the world. They were obviously untrained in these matters and made no effort so my sister offered to pay cash and she will claim on return to the UK which was imminent. After receiving treatment she went to the same reception, asked for the bill, got it, paid and left. Long after my sister returned to the UK Olivedale Clinic try to say that the account wasn't settled? Now they are saying only part of the account was paid. That is a failure on their accounting procedures. What more can a customer do than offer to pay, receive the account then pay immediately. They now expect me to pay. I gave them my contact details as the reception didn't understand my sisters accent definitely not her Scottish address. We wouldn't know what the account \should"be as the UK has free medical. Netcare please sort this out."""