Burns due to wrongs treatment what action can i take

I Had Laser treatment ( session - 8) on 14-08-2016, and they burnt my leg that blisters and scars formed and i suffered from acute pain n trauma. So they agreed to refund me the amount of RS. 35000 that i paid them for getting the treatment. its been more than an year that i am taking this treatment and i never suffered from these injuries .Also the primary objective of this treatment was to reduce hair growth and till now no reduction has been seen. i have already taken 8 sessions. i started taking this treatment in January 2015. now that my legs are little better, they are not agreeing to continue my treatment of laser hair reduction saying that they are refunding me the entire amount and thus they wont give me laser treatment. Kindly suggest what should be my Action?