The Thai Government has required banks to close nom Thai bank accounts unless they are proven to be held by lomg term visa/extension holders. To do with illegal scams and especially by Chinese illegal operations.
Actually, you are not on a Retirement Visa Extension at all. When you visa ran out it was finished. I think that you are probably on an extensionj of stay based on being over 50 years. That is not a vis extension.
Almost impossible to open a Thai bank account if youenter this way on a 60 day visa exempt entry. Without a bank account you cannot get a retirement visa. Best to get a Retirement visa from your own country before coming to Thailand.
You had a visa exempt entry and not a visa on Arrival. The title documnet for land (and or house) does not help you. You would need your wifes Thai Id and possibly her house book (address registration).
Your biggest difficulty will be to open a bank account in Thailand which (even with paying an agent) is almost impossible unless you have a long term visa. If you want a Retirement visa it would be best to get it in your home country before you come to Thailand.