[Resolved]  Tata Housing Development — tata amantra, kalyan project

I have booked a flat in tata amantra in last quarter 2013.
Following charges have levied:
1. Car parking - have been charged 4.75 lakhs + taxes (Is it legitimate?) - approx 5.25 lakhs
2. Club house - ready (Still charged 12-18% gst)
3. Installments due after implementation of gst @ 12-18%, is it within the law, though flat has been booked
4. New and previously unannounced additional betterment charges.

Have seen similar complaints by others too on this portal

Pls reply here, for all to see.
No personal contact and appeasement pls

Integrity of "tata" housing is in line here..