Consumer Redressal

respected sir i have purchased sare saamag property in lal kuan ghaziabad in spring view floor in 2012 at the time of booking builder have sale 9045 sq feet in three bhk and time of possession was 2 years +offering 5% additional discount on next demand and 5 rs per feet penalty on late possession ,now builder have extended area into 1045 without our permission and not given the possession and discount till now when we are requested for possession and discount they told your time started from approval of project and thats is grace period and your discount will be released by saamag he is another organization even project name is still sare saamag ,i have stop the payment same as my discounted price ,now sare have claimed interest on that and given notes to cancel by flat on behalf of sare saamag realty pvt ltd pl help what to do now ANIL RANA s k 12 shastri nagar ghaziabad ph 9990577505