@Kool ******
@Vicki ********
appears to be saying that the incoming funds went through Kasikorn en route to her account at Bangkok Bank, and that Kasikorn gave her a credit advice showing that the money had originated abroad. That's pretty common with Wise, but shouldn't be happening when she has a BBL account and selected "funds for long term stay" from the drop-down menu.
Many other people have reported successfully using those credit advice letters from intermediary banks at immigration offices, so either the officer she dealt with didn't understand what it was, or her local office just doesn't want anything that varies from the norm.