Please NEVER use these agents.
I can only speak for the UK (not the USA) but last year there were 35,000 applications from Thailand and less than 4% were declined - they will be for fraudulent applications or for lack of the correct info’. This info’ is readily available on the official UK government immigration website.
These [...]

Visa on Arrival - no border runs to extend Visa as of Oct. 1, 2006
VISAImmigration confirms the end of border runs from October 1, 2006 - Thailand tightens visa rules for tourists to cut illegal workers
BANGKOK: — Thailand will tighten entry regulations for tourists in a bid to crack down on illegal foreign workers, the [...]