Maintenance charge

I live in a society of 220 flats (1 and 2 bhk of different size) where we have registered the society last month and same day our first general meeting happened and we have elected committee members also including secretory and chairman. Now this month suddenly committee has increased our maintenance charge from Rs.2 /sq ft to Rs 3 /Sq ft. This was not discussed in first general meeting. Now after noise from other members they are conducting SGM to take this decision. They are charging this new rate for my remaining months from 1st Year for which I have already paid maintenance with Rs 2. maintenance paid by me on possession date with rate Rs 2/sqft:- Rs 21648 (date 6th Aug 2016 to 5th Aug 2017) Now they have somehow calculated expense of Rs 9020 from my maintenance from 6th Aug to 31 dec 2016 and kept the balance of Rs 12628. Now, New rate and pay cycle imposed by committee: Rs 3/sqft , pay cycle 1 Jan 2017 to 31 Dec 2017 so my maintenance will be Rs 32472 for the year 2017. So they have deducted balance amount Rs 12628, (32472 minus 12628)= Rs 19844 till 31 Dec 2017. Can they do this?