I tried many small branches on advice without success. One branch told me to marry Thai lady to open account. Ended up using Laurie, Chiang Mai visa shop with no problems and now have retirement visa.
Maybe ears blocked caused by flight. This has happened to me either go to doctors or hospital for check. I needed wax removed from ear, after removal all good.
You can’t own land but can lease house on land for 30 years. The lease has to be registered with lands department to be legal. For 30 years you live in the house as normal owner. Usufruct lease is the most secure option.