I was waiting for 1 hour to be able to check in. I arrived at the hostel at 8.30pm and no staff at all, tried to contact hotel's phone number no answer, tried to contact traveloka, one of the Customer Support called me and informed the hotel staff will come in a minute but until the next 15-30 mins no one showed up. Hostel staff just showed up at 9.30 pm (1 hour after I arrived). I already informed I was coming late and nobody response but when I arrived can't check in, hope this kind of misunderstanding can be avoided in the future.