Niit Student — Refund - regarding my money back of particular course

Address:	Chennai, Tamil Nadu
Website:	niit

Iam divya ...a student of NIIT in tnagar branch.
actually i have joined for the advanced java and andriod corse, and i have paid the full amount during joining itself.
they only taken class for java and they are not starting android classes.it has been 1 and half years that i have joined. the couse time has also been completed.
and the course fee is about 7, 500 and i want my money back.

but they are not responding properly and they are not refunding it too.no respect at all.

i want my money back .please take necessary action regarding this issue.and iam having all the evidences like bills.