Be blackened by the platform of Piggy B&B.

If you contact the landlord one or two days before the check-in date and say that you may not be able to stay, and the landlord refuses to refund the money, you can call 123 15 to make a national complaint (all netizens on the post bar do this, and the result is also a refund). However, if you check in at one o'clock that day, it may be enough to tell the landlord in the morning. You can also try 123 15. As long as you don't check in and don't ask for a refund, the chance that the platform can give a perfect answer is zero.