Car Parking Charges in Tata Amantra, Kalyan, Thane, Mumbai

Booked flat in Tata Amantra in last quarter 2013. As was conveyed by sales executive of Tata Housing project that Car parking charges would not be applicable if the Supreme Court order is upheld, it was agreed on the application form to "purchase" the car parking for Rs 4.75 Lakhs There are several people in the society who have not purchased the car parking; this would be an issue in the future, as people would randomly park their vehicles in the society "free of cost" and self and similar kinds would seem fools having spent over 5 lakhs on the car park(incl of taxes) Following charges have levied (additionally): 1. Car Parking - Have been charged 4.75 Lakhs + taxes (is it legitimate?) - approx 5.25 lakhs 2. Club House - ready and operational (still charged 12-18% gst), before the OC was received for my flat 3. installments due after implementation of GST @ 12-18%, is it within the law, though flat has been booked in 2013 4. New and previously unannounced Additional BETTERMENT charges - about 85,000 I am yet to sign the Agreement of Sale documents; kindly advise