Have offices here in Thailand and in the UK and all of the UK Visa applications are fully regulated by the solicitors regulatory authority back in the UK. In 2022 and 2023, they have had he 100% success rate for all UK Visa applications.
They offer a free no obligation conference with the UK immigration director who is a qualified solicitor within the UK, who will assess your circumstances and the merits of the application and discuss any questions that you may have. The benefit for the applicant is that they can speak in Thai with the Thai lawyers here and for the sponsor. You can speak in English both here in Thailand and in the UK. I hope this assists 
Absolute rubbish. Your Visa is dependent on your marriage and you renew before your expiry date.  you must comply with the regulations with regards to requirements for your extension thereafter, where needed you can apply for your multi re-entry  certificate, this is separate from any Visa requirements 
The operate nationwide and have been incorporating companies for expats and overseas nationals together with assisting with Visa at work permit requirements since 2006. They have a British lawyer as their client foreign affairs manager with a full in-house team of Thai, lawyers and accountants to assist. They have a very good reputation and pricing strategy which is clear and transparent.
Contact the following they will assist and walk you through the process and fees and illegalities. It is not as expensive as you may think. This company also has full accountancy services.
Try these guys, they have a British lawyer at their head as foreign affairs client manager. They have been setting up companies and providing accounting and business support since 2006. I hope this helps 
They can provide you advice and assistance with the closure of the company and the filing of closing statements et cetera via their in-house accountants drop them an email at