Bharat Sanchar Nigam [BSNL] — surrender of landline and refund of security deposit.

Address:

Kolkata, West Bengal, 700014

As instructed by bsnl, calcutta telephones, 148, chittaranjan avenue, kolkata 700 007 i surrendered my land line no.[protected] with the copy of following documents.
Photo copy of last paid bill.
Photo copy of pan card.
The above documents with letter was received by the above office on 7th october 2017 and i was informed that refund amount would be sent to your billing address by cheque within 3 months from date of receipt of letter.

Today, while contacting the bsnl customer care, i have been informed that diconnection of the above line in progress as such refund is not made.