almost forgot, the court might enforce a 10% interest on the amount asked until they are paid out, and sometimes the starting date for the interests is the day the amount was taken by the other party
so if it's 2 years since you got taken to the cleaner, that 10% + 10%
4000 USD is about 100,000 THB
Not small, but not big
The local provincial court will take your case, and force the defendants to a financial settlement
lawyers fees might be around 30-50K THB though,
There are a lot of incompetent farangs businesses here, never forget that. They couldn't make it back home so they prefer to go for easier victims here.