What Should I Do After Being Denied a 60-Day Extension for My Non-O Visa in Thailand?

Also now that you DO meet the proof of funds, you might not need to get a year-long, multi-entry Non-O visa, but just get a 90 day single entry Non-O (either vientiane OR savannakhet will sell that)

Go to the Immigration Office and ask for the hand out with requirements to apply for a 60 day Extension of Stay based on visiting Thai family members, also ask the hand out with requirements to convert your Visa Exempt Entry and following Extension of Stay into a Non Immigrant O visa based on being married to a Thai National. Than at home, make the copy, tick the list and continue till all done. Go back to Immigrant and apply for this visa if time enough left on your current Extension of Stay till 7 Feb 2020 or apply for the 60 days Extension of Stay. If you think otherwise, fine. You can not get the 1 year Non Immigrant O visa based on being married to a Thai national in Vientiane as you think but only at Savannakhet in Laos, but also there you need to meet the requirements, not taking friends and thinking it is all good.

I usually fly to udon thani then take minivan to the border. Once over the border take the local bus to central Vientiane. Be warned...you must prebook an appointment at the Vientiane office. There are no walk ins. Best to book 2 weeks or more before you go there as slots are limited. Good luck.

So Jomtien would not give you 60 days family visit extension of stay?

And what kind of documents did you have with you to apply for this 60 day Extension of Stay based on visiting Family?

what immigration office are you using? It looks like you were stamped on a 30 day visa exempt, and you got a 30 day extension of stay.