My upgrade to Prestige City 3BHK: Where did the space go?

₹85 lakh for a 3BHK in Prestige City, and I'm honestly feeling short-changed. We're currently in a 2BHK and wanted a proper upgrade, thinking this would be it. But the actual carpet area after possession... it just doesn't feel right. The brochure showed something else, matlab, the usable space is so much smaller than what we expected. It's a real issue for daily living, especially with kids. Maintenance charges are also a shocker. Did anyone else face this with Prestige City? How do you even deal with this kind of discrepancy?