Just got my 3BHK possession, feeling totally misled

Moved into my 3BHK in a Budget Homes corridor project last month, and I'm seriously regretting it. The brochure promised so much, but actual maintenance charges are way higher than quoted. Plus, half the amenities they highlighted aren't functional yet. We paid around ₹1.1 Cr, thinking it was a solid deal for a 3BHK. Now I'm wondering if other projects in Budget Homes are actually better for this ₹80L-1.5Cr range. Is this bait-and-switch with builder promises post-possession just the norm? Did anyone else face this? What did you do?