Jay Hind Apartment: My post-possession amenity surprise

Last month I got possession at Jay Hind Apartment. Brochure mein jo grand clubhouse aur green areas dikhaye the, they're nothing like the reality. Half-built gym, landscaping is just mud. Maintenance charges full le rahe hain but amenities toh use hi nahi kar sakte. Is this normal for New Delhi projects? Kaise deal karte ho builders se for such issues?