I had the same problem in the UK and got the same email responses. I had booked one way to BKK with Emirates and my flight time arrived with no approval but all docs checked and passed. So I booked a trip to Vietnam as a precaution which I could easily cancel. At check in they did ask about the one way ticket and I told them about my Vietnam ticket and all was ok. I got to Dubai airport and my NON O came up approved. What a relief 😅