I made phone calls 3 times and takes about one hour to receive my laundry,
1 - made a phone call to deliver my laundry since I received their message that laundry finished when i was out, but a staff came to my room after 15 minutes for room clean. I told him that I ordered laundry delivery and share my request with staffs
2 - waited 15 minutes but no one came, so made a phone call again to deliver and staff answered that will check and call me back
3 - waited 15 minutes but no call back, so made a phone call again and a staff answered to deliver at once, after 10 minutes i received my laundry finally. Based on my understanding, 10 minutes does not mean "at once".