Parking blocked by residents of society

I had not been allowed to park my car in the society inspite of my repeated requests. Also the society is biased towards flat owner not all are treated equally. I had also informed the secretary of the apartment that if I'm not allowed to park my car then I will not be paying maintenance. My flat was empty then. I did not pay maintenance for further 3 months. Later when I started parking I'm paying maintenance but now again I have not been allowed to park demanding the maintenance of 3 months which I had not paid as I was not allowed parking. A member of the society who enjoys privilege in parking has argued saying he too will not pay 3months maintenance unless I pay. Another member has not paid 8 months maintenance stating same excuse. However their vehicles and cars are still parked but not mine. I am not allowed to use my car if in parking even during medical emergency times. The person enjoying privilege locks the apartment gate deliberately with different lock. The apartment has not formed society yet and the parking area is common parking which is not ment for 4 wheeler parking but other members of society do park their cars except me treated differently. Kindly help me.