Tdi City Agra — not giving possession of plot bought in 2010 years.

Address: f-1,C1/52 CHITRAKOOT,VAISHALI NAGAR, Jaipur, Rajasthan, 302021

We bought plots at tdi city agra. There were ada approved, we paid and registered in our name about 9 years back but they have not given us possession till now.
Remember this plot is registered by
Up-nibandhak (Tratiya)
Agra sadar
Authority o[censored]p govt. On oct, 2010 after getting all related fee etc.

I am unable to understand why not they give us possession after asking so many time on phone, they always reply "ho raha hai"you will get in next month
What i can do pl guide