Airtel Postpaid
Want to money back of the postpaid connection

I have applied a airtel postpaid on 1 st july. they have taken Rs 300 and donto activate my no. after submission all documents also it was not activated .the reason was that i am a student .though i am a junior scientist in IISc. on 13 july they informed me that my 300 will be given me back within some days via check or by recharge. but still it was not reach to me . i want to get back my money