******** clients and getting away with it

I am a platinum credit card holder and have used the slow lounge free of charge previously . when I used the slow lounge recently I was charged R250.00 x2 . I was not informed of the charge by the lady the received us into the lounge . I did not authorise the charge . and I demand a refund . this is I my opinion a ********** charge . please FNB CLIENTS be aware . a few of my friends have also been ripped of in the same way . .