As Indian passport holder you cannot do 1) Extend your tourist visa within Thailand, the maximum you can get is 7 days extension and will have to leave within 7 days.2) Indian passport holders cannot do land border runs to extend their visa or get new visa in neighboring countries like Lao, Cambodia, Myanmar or Vietnam 3) The only option for you is to return back to India and apply for new tourist visa single entry or if you want to stay longer get multi entry tourist visa which will allow you to stay for six months in 60 days increment.Lastly don't follow wrong advice which will land you in trouble, if unsure as to your status contact your nearest immigration office for details.
Have a safe trip and enjoy your stay. Dont forget your Re-Entry permit or you will have to Re-start the visa process again. God Bless.😊😊😊😊😊