HDFC Bank — Falsely charged for lounge access

I was travelling to Vietnam from Kolkata airport on 5th of April 2023. I used my Priority pass at the airport lounge of international terminal. My priority pass comes with 12 international and domestic complimentary transactions. Still I was charged a hefty amount. I feel cheated by the bank as they have falsely charged me even though I am supposed to get complimentary access on the lounge.