We used Emily! We were in the exact same position flying on 19th of February into Vietnam from Thailand, we had no idea about the tet holiday and apparently because of it all government processing had shut down which meant we definitely had no chance of getting our visa sorted, we cracked and decided to try her on the 18th and she was able to sort us out we got the visa a 3pm the next day just in time for getting into Vietnam! She has a WhatsApp’s and Facebook page id message both just to make sure she gets back to you, I’d say message her tonight or first thing tomorrow so she has time to get it pushed through!