It's okay you will receive it on the 7th date. If don't see it on the 8th, reapplied with the vaccine QR code uploaded (below the vaccine certificate). I did everything perfectly but still got mine just yesterday (exactly 7 days). And i fly on 8th Dec. Call to urgent service numbers & send email didn't help in my case though 😂😂
i've just applied mine 2 days ago.. i'm nervous as well. Vietnameses are visa-free to travel Thailand (before covid), now it feels more nervous than applying for a visa.. 😅😅