Your counsel can opine on recourses thru consumer, class suit, civil, criminal… courts , RERA..
Preferably approach ASAP, alongwith with elders of your family, competent and experienced well wishers, seasoned community leaders and find a very able LOCAL counsel of unshakable repute and integrity specializing in concerned field of law e.g; Consumer/Criminal/Civil matters as in your case, and well versed with LOCAL applicable rules, precedence, latest judgments etc …. and worth his/her salt, and your counsel can advise you after examining all docs, evidences on record .., so as to defend your long term interest.
There are such very able counsels at each location.
Check for such counsels at LOCAL Consumer/CIVIL courts..HC,SC