Go to imigration in phuket town quit useing small by the book educated offices thai are not multitaskers and have very limited scope of intelligence around red tape its common woth most all adians
You will need a registry of where you live with photo of you infront of address you will need to have 800,000thb in your bank for a period of no less than 3 months very doubtful you can open a bank account without a agent they keep accounts with needed funds and attch your name until opened its a frustraiting process i have a bank account at bangkok bank but it wasnt easy willing to keep your money my account for 5% a month interest fee if under 1.5 million us
I dont care what you think you gotta show 800,000 thb in a bank for a period of three months and your bank book is worthless to imigration you need printed stamped documents from the approved bank i am very expierianced in this also American