@Zou ******
Sorry just read another one of your posts. You said "the agent disappeared". If so, leave immediately, by air, with 20,000 Baht cash in hand. Prepare to spend a good year outside of Thailand unless your visa hasn't been canceled or it was canceled less than 90 days ago. In that case, you can come straight back in, though I wouldn't.
I'd still stay away for a while and then return with at least a tourist visa.
If you like Thailand and want to spend time here in the future, the next best thing is to hang out in one of it's neighbors in the meantime. Cambodia is the easiest, though Laos is similar.
Both countries rely heavily on agents bribing immigration, though unlike Thailand, there doesn't seem to be any crackdowns going.
Also, it's perfectly legit to get a 6 month extension on a 1 month ordinary visa for Cambodia, leave the country for a day, then come back and do it all over again. For the 12 month visas, agents fake the paperwork for a company and work permit. Unless you're 55 and over, in which case you get a legit retirement visa with no funds in the bank required.