You can open a Thai bank account with a resident’s permit. You pick that up from thai immigration. With that and your tm30, you should be able to open a thai bank account. Not all banks will do it for you so keep trying different bank branches until one says yes.
Where are you. I will tell you where your local western Union is. It’s a pretty easy Google. Literally everywhere has western union options and it’s often in banks. Because that’s how Thai girls are picking up money from their bf’s