Booking.com Charged Me $150 for a Hotel Room Advertised at $100

I made a reservation through Booking.com for Hotel Maina in Las Vegas, with a total price of $100 shown at the time of booking. However, on 6 June, when the payment was taken from my credit card, I was charged $150 in total instead of the agreed $100, meaning I was overcharged by $50 without my consent. I have not yet been able to resolve this issue directly with Booking.com or the hotel, and there was no clear explanation given to me for this extra $50 charge. I booked the room based on the price shown on Booking.com, and I did not approve or agree to any additional hidden fees. I request that the unjustified extra $50 that was taken from my card be refunded to me as soon as possible, and that the total amount for this stay be corrected to the original $100 price shown at the time of booking.