Godrej Sector 150 project: Kya delivery delay normal hai?

My Godrej project in Sector 150, Greater Noida, was supposed to be delivered 18 months ago. I'm based in Dubai, site visit can't happen easily. Builder ki team ab phone bhi nahi uthati, matlab, what's happening? RERA complaint karna padega kya? Anyone else facing such delays with Godrej or ATS/Mahagun in Greater Noida? How do you handle this from abroad? POA se kuch help milegi ya it's a lost cause?