Roomstays.com Travres Charged in dollars instead of Mexican pesos - about 10 times cost Internet

I reserved a room at the Mendoza hotel in Guadalajara.  Many offers on the web for about $60.  One of the offers was for $520 or so pesos.  I made that booking.  My credit card was charged in dollars.  I called Travres, the name and number on my credit card to report the exchange rate error.  The phone number 877 283 5585, off the bat,  gives a whole of of options to select from - a wide variety of billing problems.  When I had an agent on the line she told me the charge was correct and that as they were a US company, the charge was in dollars.  I pointed out the most expensive room in that hotel is around $100, she answered, you clicked so you owe the money.  When I asked for the agent for her name, the address of the company or the name of the supervisor, I was told that the line was bad ans she could not hear what I was asking.   I then contacted Roomstays.com which had sent us an email confirming the room.  I was initially told the currency issue would be investigated.  Then no further communication.  Upon re-emailing Roomstays customer service, I was told Roomstays was a US company and the bill was in dollars. I pointed out that the hotel did not have any room in that range and that it was clearly a mistake.  I was told hotels are more expensive a Christmas and we had a nice room.  8 times more expensive?

a rip off taking advantage of the similarity between the 2 currency symbols.