Redevelopment concern! how to trust the developer when he doesn't provide proper details of project, asking existing members to buy Car parking.

Society got a proposal from builder saying free parking for all 1bhk, and 25 percent increase carpet area for every flat.

After 2 months of back and forth and lots of meetings he is now asking members to buy parking for 5 lakhs each. Stating without parking his flats won't get sold if he gives free parking to all members. He doesn't want to share plan or measurements despite repeated requests.

MC is Cahoots with builder and pushing others to buy parking which is against the bye laws.

What would you do if you were in such a situation?