Greater Noida Authority — delay in work of tower f2 (no work from last three years): booked unit no. f2/1703 in patel neotown noida extension

I had booked flat in patel neotown noida extension in june 2010 in tower b unit no b2/703, after that, same shifted to tower f2 unit no f2/1703 in october 2013 by the builder due to that, i have not got the flat of my choice and i get it the top floor flat which was not my choice.
After the passing the 8 years they are still on the podiam level and no further work is being done.
Please be informed that as per flat buyer agreement, handing over period for the said flat is 40 months from the date of signing of agreement i. E. Up to 28.02.2017.
From the above it can be seen that possession date has been already passed before one year back and builder is not doing any work in the said tower.
In view of above greater noida authority is requested to take the necessary action regarding the completion and handing over of the flat.
Regards,