Regal Emporia Infratech delayed possession - what to do?

6 months delayed now, Regal Emporia Infratech are saying OC is stuck. Paid almost 90% of the amount for my flat in Sector 10. Honestly not sure what to do now. My parents keep saying I should've gone for ready-to-move. Ab samajh nahi aa raha. The EMI is killing me, and I'm still paying rent! Is it worth taking legal action? Or should I just wait it out? Heard some people are forming a buyer's association. Anyone else facing similar delays from Regal Emporia? What are your thoughts on under-construction vs ready-to-move in Noida now? Should I cut my losses and rent it out once I get it? Or sell immediately? Any advice is appreciated.