Dear @deepika_pahal
For your issues related to delays in the installation of air fiber of Jio even after complaining to the customer support team, you may contact the Jiofiber department by calling at the toll-free number 1800-896-9999.
Further, you may lodge your complaint with the Nodal Appellate Authority of Jio Telecom by calling at 1800-889-3999.
We hope this helps!
For more help, read: Where to file a complaint about Jio services?
Still, have any doubts? Ask by replying to me.