Airtel — broadband refund not initiated

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

I wanted a broadband connection from airtel so i raised the request online so they asked to make an online payment of 500 so i did Using CAF NO.[protected] on 28 april
SO I have made the payment but later it was informed that feasibilty is not there in my locality so they will refund me, now my amount is not yet refund as i have also mailed the payment screnshot as well, but tgere was no response from airtel kindly help me