FNB/Lanseria XS Lounge rip-off

I went to the Lanseria XS Slow Lounge, for the first time and was asked to scan my boarding pass I asked the receptionist to first check if I qualify for the lounge and she told me to swipe my credit card to see if I qualify for vouchers. Myself & my colleague both swiped our credit cards and I was told I qualify but not him but that he could enter as my guest. We were shown in, spent 30 minutes there and had a 200ml Coke each and now, 3 days later, have had 2x R300 deducted from my account. I feel ****med and misled because it was imp**** that I qualified for "vouchers" but in fact paid R600 for 2 Cokes.