Convenient comfortable studio in peaceful tropical forest G7

These guests are very unusual. They stayed here a week and blasts music during quiet hours and when we ask them use earphone .they abruptly pack their stuff and left .we found they left key on door and all their stuff gone so we go thoroughly cleaned their trash out. And at night we notice the room light on so we go check and they claim they just accidentally left key on door and moved all their belongings. It’s late at night so we decided to let it go so we won’t bother other guests.the next day they left again and ask refund claim if I don’t refund them they will leave a bad review. I contact vrbo show the picture of the damage they cause at our room and vrbo tell us we can just call local police to ban them from come here. I don’t know what they on but certainly they are not the guests you want in your home.