What are the options for extending a retirement visa in Thailand given a complicated financial situation?

I have a complicated matter concerning extension of retirement visa, and with this also the follower visa of my wife.

To be short. We arrived before covid. My wife, to whom I was not married to, at the time, went to Philippines to take care of her dying father, when 15 days later the country closed. I was on multiple entry visa at the time, and exploring the possibility to install in Thailand. To not take the risk to have the obligation to leave the country, a visa office arrange retirement visa, that was also done by an agency.

My wife came back in January 2021, after being separated for almost a year. We married in October last year. Immigration allowed exceptionally at that time a following visa due to covid (normally you have to ask this at an embassy outside Thailand).

But now our visa has to be extended before 25 th July. I am tired to pay fortunes at visa offices, they are very, very expensive. So I thought I would be fine myself, as I transferred a few million baht to my account, the last year (bought a condo). But I went a month to Europe with my wife (yes we thought about re - entry permit), but not did a transfer that month.

That is the problem with sometimes strange rules. I can proof, I have enough to live on in Thailand, with all the transfers I done, but omitting one month to put money on the account, is probably going to screw me. I also have a statement of the firm, I invested my money in, that they give me an allowance of 3000 € a month as income. But one month not thinking about the transfer is going to give me problems, I am sure.

I could use a second possibility. I have over 800.000 for 3 months on my account. Great you would say that is your solution! Only that if for extension, it should have been on it either the last year, or a minimum after 3 months obtaining the visa , last year, which is not the case and that they can see.

If someone sees another solution then paying over and over again big amounts of money to an agency, all advice welcome. For next year I will make automatic transfer every month, but now I am lost.