See Point 22. And have 800.000 Baht on your Account, and have a insurance, for example from lmg (https://www.lmginsurance.co.th/en/Products/Pages/Universal-Longstayvisa.aspx)
You tried it in the banks at the mainroad and in tesco lotus of Pak Chong too? Why in Pak Chong - you live here (I live in Pak Chong)? You ask for a real account or an account with a saving book (and visacard)?