like Graham Seal wrote Go it immigration and get their list of requirements and do it yourself. 1900 baht later, you'll walk out with a sense of achievement. It's really not that hard. I once remember reading a post which said, even a caveman could do it.
Ever considered reading reviews and taking time to deal with legitimate companies and sites, It's not that hard. They must be the last people on earth that don't know that a TDAC is free of charge. They seem to ask questions on Facebook after they have been ripped off or made a mistake. If they had asked first. People would probably be better off.