Get a good lawyer and it may save you a lot. Thai woman and men hate dealing directly with lawyers just not within their mindset. It also means you don't need to talk to them anymore.
If you are in the UK you are better off applying directly to the Official Royal Thai Embassy Portal. I've included the link for you. This is a really easy process and if you apply for a Non-O single or multi entry visa. Once you have sent it in. You will have your answer in 10 working days. They are lovely to deal with. This is cheapest and easiest way to apply. When you arrive you can then open a bank account at the SCB with this visa.