arh not a good idea, you should have seen what the agent was submitting for you so you know it was all ok. That will be your problem the paperwork will be incorrect
Suggest you each apply for a Non O over 50 retirement visa in Qatar through the e visa online system then when you arrive in hua hin you can open a bank account which will then allow you to each deposit 800k baht and look forward to getting your first year extension
You haven't given enough information to really help other than to guess? If you applied for a soft power DTV then the key is making sure the facility you are using for example if using muay thai then the gym needs to be accredited and the course to last 6 months. The rest of the paperwork is straight forward.
From the London embassy mine took 14 days as they are very busy this time of year. They do say upto 10 working days and that resets if you need to give additional information. Fingers crossed for you
Firstly it depends what visa you have, the LTR wealthy pensioner visa exempts you from thai tax. If you have a standard retirement visa then they will be accessible for tax if you are a thai tax resident in the year you remit the money, doent mean you will pay taxes but you should submit a thai tax return, in your case probably would pay thai tax on your remittance. Thailand has a thai tax proposal that is being reviewed hopefully approved that will give more opportunities to bring money into thailand without paying tax. When they changed the interpretation in jan2024 many thais stopped bringing money into thailand so the revenue department has lost lots of tax from thai nationals. This is looking to change so thai nationals will start to repatriate money again knowing the tax burden has been lifted. Look out for the changes in the coming months