Bharat Sanchar Nigam [BSNL] — security refund not processed since 5 months after disconnection

Address:	Faridabad, Haryana, 121002
Website:	www.bsnl.co.in/opencms/bsnl/BSNL/about_us/consumer_griev.html

I have tried reaching BSNL several times but sadly couldn't. I have given application for disconnecting of my account on 7th February 2018. My active number was disconnected on 26 feb 2018. I had deposited 2 instruments for the same and local office SDO in sector 15 faridabad had assured me that it will be taken care of and the last bill will be adjusted in the deposit amount. It's been more than 5 months since the disconnection and I am still receiving bill. My security refund of Rs 5000 is still not processed. I called the GM and multiple times to accounts office and they never pick up. I went to office and asked and nobody cared to give any response.
I am really worried about the service and need help in this matter.

I sincerely look forward for your help and fixing the issue quickly of disconnecting the other number and process the refund.