If you are on a 12 month Non-OA Visa which has not yet expired (the Visa not your entry stamp) you can get new 12 month nsurance and border bounce to get a new 12 month entry stamp (but not multi-entry when the Non-OA is expired)
You should get the 30 days on Visa Exempt, it is a Tourist Visa that Indian passport holders cannot extend, seems to be a misunderstanding here by someone. You can also ger the 60 days, visit Thai family extension. Go to the office, don't call, and you will get your extension.