I have a KUL-REP flight booked. When I look on the site it says to add a 20kg bag costs 67 MYR. But when I try to actually book the baggage, it charges me 102 MYR. I think this might be because I made the original booking in USD so they are trying to charge me 24 USD for the bag and then converting it back into MYR. But since I am paying in MYR, is there a way for me to pay the actual price of 67 MYR?

I went onto chat to ask but the rep disconnected when she didn't know the answer (after I waited for 45 minutes). Emailed and got no response and flight is tomorrow. Any way around this or should I just cough up 102 MYR?