Reliance Communications — refund issues

Address:

Bhopal, Madhya Pradesh, 462039

I had reliance postpaid connection with no. [protected].
Relationship no. :[protected]
Tariff plan name : rgmnpcw149
Now the no. [protected] is ported out to another operator.
I had made the excess payment. The balance amount pending so far with reliance is of rs. 192/-.
I have requested reliance customer care through several mails & reminders for making the refund, however they are not responding. It's now about 75 days over, still waiting for the refund.
So please help me in getting the refund of rs. 192/-.
Attached herewith the bill for the purpose of evidence.