If you want to leave your present MBBS college to join another college by taking NEET again, you will likely face a bond penalty fee which is near about 5 lakh to 40 lakh rupees in case of Kerala state medical college you can confirm the actual amount of penalty from college of yours.

and yes, there is usually a concession for SC category students when it comes to bond penalties in Kerala but you have to pay some money for leaving the college in between.

Think of your decision again if its not a big issue continue with same college as you get mbbs degree from here too.at the end choice is yours hope you will get what you want.