Hi mate, try this link to call up. There are a lot of numbers for you to call up thailand on this. I use numbers from here to call home & it is dirt cheap. http://www.cheapestinternationalcalls.com/CheapestCalls.asp?country=Thailand&calltype=landline

Calls cost from 0.5p/mte to whatever. All offers are constantly updated here.

Glad to help you out if you require any more help regarding same.