Am I defaulter and if not whom should I approach

I booked a flat in Pune in March 2017 and paid 72% amount by July 2017 and I suppose to get possession in December 2018 as per agreement. Builder demanded 60% amount which I paid while his work was stopped by villagers for almost 6 months from April 2017 which was not in my knowledge. Builder got O C in October 2019 with condition to provide sufficient drinking water before handing over the possession. Builder dig two boar well but there is no water hence providing water tanker now he wanting to handover the society and get rid off all the responsibility. I haven't paid balance amount as there is neither gram panchayat water nor boar well water. Builder fixed the electric meter but no connection and providing electricity from one meter to all 49 flats and after handing over the society he may disconnect the power supply. All flat owners have taken possession. I haven't paid full amount and not taken possession. Am I defaulter? Where should I make a complaint as builder not provided basic amenities