What should I expect during a 1-night quarantine upon arrival in Phuket regarding COVID testing and results?

Just a heads up, doing the 1 night quarantine. arrived in Phuket Monday 7.00pm had the COVID test at the airport & they give you a brochure with a QR code to scan and put your details (passport, email ect) they tell you when the results are ready they will email you with the results, sounds good same as we do in Australia. Next day waiting waiting, rang reception after lunch, they told me it was confirmed by the night shift that anyone coming to the hotel last night is negative. There is no email, spoke to a few other people same thing. Make sure you call reception for confirmation, as I wasted 1/2 a day.