Indira Gandhi National Open University — about fee refund

I am asma thaseen..i took admission in PGDHE but later i cancelled and talked to officials for refunding..as they say i sent email many time to different emails ids..but nothing can happened..please tell me how i can receive my refund as it almost 3 months of my cancellation of admission..is there any other procedure or responsible officials with whom i can talk and resolved my problem
Thank you..