DLF Home Developers — delay and no handing over of possession

Address:

sansad marg, newdelhi, New Delhi, Delhi, 110058

Dear sirs,
I had booked a two bedroom apartment (Dlf capital greens : phase ii) shivaji marg, moti nagar newdelhi with dlf home developers in 2010. After much delay of 8 years they finally offered a possession in july 2018 where by sending the final payment account by increase in area of 147 sq. Ft as well as other charges. As i requested them to come back in detail about the increase in area for which did not reply to me for almost 18 months. After much follow up they finally replied to my query in december 2019 and added cg condominium charges (Maintenance) too for those 18 months. After 3 months of back n forth the amount was finally settled and payment done in lieu of which they issued the final possession letter and no dues certificate in april 2019. But the day i had gone to take possession i was not handed over reason being the cg condominiums (Maintenance) for 18 months is pending. As i explained it to the handover team that the delay was due to pending issues at dlf end and after much back n forth it is already settled. I have submitted the final possession letter and no dues certificate issued by dlf home developers but they are still not handing over the possession till the dues are cleared. As i had explained and followed them through mails since last 3 months that all dues have been cleared and there si nothing pending.
I need your help to sort the matter with dlf and much delayed interest till date for not handing over the possession.
Looking foward to an early reply and thanking in advance