Not upholding offer

When I switched to platinum I was informed that I will have access for free to the slow lounge and no t&C's were mentioned to me, Fnb does record calls so go pull uo my calls and see what was told to me. When I do use the lounge that was offered to me to switch over to platinum then Fnb wants to charge me for it. Very shrewd and deceiving. I will be changing my bank over to someone else who doesn't promise things and charges me for it. I phoned the call centre as well. Didn't help at all