I called up the number below, and it said something about not having paid their bill...
I thought it referred to my bill, but was then repeated in other languages, and I could call to other thai numbers, so the problem isnt by me.
Reservation & Ticketing
Office: THAI AIRWAYS INTERNATIONAL (TICKETING)
Address: SILOM TICKET OFFICE
485 SILOM ROAD, BANGRAK, BANGKOK 10500
THAILAND
Phone: +66-2 288-7000