Noida under-construction projects are a total gamble!

Okay I'll be honest -- I'm seriously regretting booking that under-construction flat with SS Group in Sector 26. They promised possession by 2025, but now it's looking more like 2027, maybe even later! EMI toh shuru ho gaya hai, aur ghar ka koi pata nahi. My wife's going crazy because of the kids' school admission. Safe neighborhood bhi chahiye! Not sure if I should just cut my losses and try to sell. Has anyone else faced similar delays with SS Group or other builders? Is it worth fighting them legally, or am I stuck? Should I have just gone for ready-to-move? Honestly not sure what to do. Koi advice do yaar.