FNB Bank City Branch receptionist thinks it's funny to make inappropriate ****** comments

Went to pick up my new glasses as your FNB Bank City branch, when I asked if I can pay the balance with Debit Card the African receptionist thought it was funny to say that they do not accept cards from Coloureds as they never have money in their account. WHAT? I then told her that I'm not Coloured, I'm White and then she said that I'm lying, she has coloured friends lighter than me. WHAT? Sorry I did not get her name, but I felt very insulted and just wanted to pay and get out of there. So sad as the service I got from the optometrist (Aymond Lawrence) was exceptionally good