BB had more issues than others though. This was both in volume and bank staff facilitating scam accounts. My BB account is my secondary account used for Grab and beer money. It was opened on a visa exempt in 2017 at the BB Branch with the most current issues ie Pattaya Klang. Touch wood it has never been frozen or any updates asked for. They know my visa changed to Retirement.
To be fair unless I saw official communiques from the bank I would not be taking the response from one bank clerk as gospel. If you asked a number you would get a different answer from each. You just said you asked 2 and got 2 different answers.
When you say research on your own what do you mean by that. Online or physically on Thailand with Thai subjects or organisations. You are still not being clear.
You need to look at LTR. The DTV is not relevant in your position. Biotechnology and other medicinal domains are target areas for Thailand. Look on the BOI website. In what area of Biotech are you experienced?
I used this one and they did everything. Gave us a pack with everythkng required for DLT. They will also do it again for buying a vehicle. Changphuak Gate Driving School Chiang Mai