Seems like a good question to ask Wells Fargo? How did you initiate this SWIFT wire transfer? Double-check the Thai Bank SWIFT code, account number and account holder's name. Twelve days for a SWIFT transfer seems unusual. IME it's ~ 18 hours.
Best to bring everything, including those things that "you've heard from people..." about. TM30, 90-Report receipt, lease, hand-drawn map, rent receipts, landlord;s Thai ID (signed), house book (signed), photos (of you in front of building). Each office may have unique requirements so you'd help yourself by sharing the office location.
