What hotel did you reserve? Now that you have confirmed the payment, the price of the hotel should have nothing to do with your reservation. I also traveled in Sanya, and the same trip should be that you didn't pay the hotel in time after paying, and the hotel later raised the price, which caused this situation.

You need to find Tongcheng to solve the problem and prepare all the confirmation documents given to you by Tongcheng as evidence. I suggest you call the Tourism Bureau to complain, or 123 15.

Sanya is a beautiful place. If every consumer compromises easily, it will be difficult to improve the tourism market here.