As you have became director officially, you need to visit Bangkok bank and notify them about new director of Delta Star Technology. Before visiting the bank, I ask you to collect all required docs of Delta Star Technolgy (certificate, docs confirming changing director issued by DBD, company affidavit and PP20 forms) and your personal docs (passport with valid VISA and WP) along with Delta Star seal (ask K. Mach regarding this matter, then you should back it her).
Please provide the above mentioned documents with company seal to me.