Modi Builders — Flat handover delayed and no response from them via call or email

Hello Team,

I have booked a flat in modi builders in 2019 year end at that time the construction stage of my block was 4 floor . Now they are able to complete the remaining blocks till 6 th floor but not able to complete the previous one.
there is no response from them via call or email by the management .
We are paying rents and loans its being hard for any middle class people expecting hopes.

thanks and regards,
sravan