MTNL Delhi — No Refund after Disconnection

Address:

New Delhi, Delhi

I put a request for disconnection on 22-Nov 2014 at Chitra Vihar Sanchar Haat, But still I haven't get my security amount. I visited Chitra Vihar Few days back & was told that they haven't received the requst from Madhur Vihar Exchange yet, hence can't proceed. I was told that in 15-20 days, I would get my refund cheque at home address, but now its been around 2 months since this request.