Housing society harassments for maintenance

Hello, We are owner of flat in navi munbai area and society is harassing us for maintenance. Due to certain issues with builder we were not occupied the flat between 2014 to 2017. Builder forcefully not allowed us to enter in our flat during this time so we haven't use our flat during 2014 to 2017. Now builder left from this place after police compliant and all. We occupied our flat once again in January 2017. Now society is harassing us for payment of maintenance dues between 2014 to 2017. We tired everything to make them understand we were not occupied this place during this time also we are ready to pay only maintenance charges (without sinking, repair found) also we are not ready to give them Interest on that amount but they are not going to understand this. We did paid all maintenance charges from January 2017 to till date with the latter that we are paying from this date still they cut the amount from Total dues and every month they are pushing us for paying interest on rest amount. Please let me know how can we tackle with this situation.