Bharat Sanchar Nigam [BSNL] — no refund yet for disconnection of landline

Address:

Kolkata, West Bengal, 700008

I have submitted my application for disconnection of landline on 30.5.2018. Today is 5.9.2018 more than 3 months still now no refund check received. The landline number i disconnected [protected].

I went there and talked to them in the counter but nobody gave any proper information about when the process will be done. I gave my address and right now have no clue when i will receive the refund amount. I still feel bsnl is a good company to provide customer service in a smart manner.
Fyi... I used to be a nri stayed in usa for 10 long years and that's why feel frustrated to experience that the refund check is not received in more than 3 months.
You can also called me at [protected] for the status or any query.
Please let me know when i will receive it?
My email [protected]@yahoo.com
Thanks.