i booked through Prestigia for 8 night…

i booked through Prestigia for 8 night stay with G Hotel Kelawai in Penang with visa card to pay for the whole period(18-26 August 2019), because of the promotional price around A$154 per night. However prestigia charged my VisaCard for one night and advised that i could pay the rest in Ringgit Cash upon checking out as selected option. To my surprise, upon checking out, g hotel staff showed me the visa card global payment slip paid before i checked in authorised by prestigia (on2Aug19), purported to indicate that i agreed to pay Ringgit using my visa card! As a result of the unfavourable prestigia chosen exchange rate, my room rate became A$167.80 per night.