Mahanagar Telephone Nigam [MTNL] — Non receipt of mtnl deposit Rs3000

Address:

A 33- silverline aprt- 51 TPS road- Borivali west mumbai 400092

I had surrender my mtnl phone[protected] to borivali telephone exchange on 1st feb 2021 with letter dt 1st feb 2021 duly acknowledged by them at sr no 563 requestingbthem to refund deposited of Rs 3000. They told me that I will get within 60 days . But yet not received
I am a sr citizen of age 70 and need money for daily medical and other expenses.
When I phone on mtnl mumbai number 28066788 account dept they say that mtnl has no fund to pay and refun of deposit pending from 2019.
Please follow the matter to get refund.
Rajnikant mehta