The hotel cancelled the order unilaterally.

1. The hotel's behavior is a breach of contract. According to the relevant provisions of the contract law, you should compensate for your actual losses. However, since this hotel doesn't pay the deposit in advance, the hotel cancels the order a few days in advance. From the practical point of view, you have time to re-book other hotels. As a contract to the other party, it is difficult for you to prove your actual loss. Therefore, it is very difficult to defend rights according to breach of contract.

2. It is suggested to protect rights through complaints from consumers' associations and media complaints. It will be better to announce and complain about the hotel's dishonest behavior and ask the hotel to apologize or make corresponding compensation.