Airtel — non refund of my request fee for broadband

Address:

New Delhi, Delhi, 110006

I raised a request for a broad band n land line connection. They came to my place n collected my documents n 500rupees in cash on 21st may 2018. It was told to me that connection will be installed in 48 hours but nobody visited again, neither i got any call. Whenever i called the customer care centre i was told it will be done in next 24 hours for sure n finally on 2nd june i was told that for some technical reasons it's not possible. I don't understand why you advertise so much if you are not competent enough technically even. Why your team couldn't assess the feasibility before collecting my documents n money? You people call so many times for new connections, is it not responsibility to call n tell yourself that it's not feasible n refund the money you have taken. The site that was told to me to get refund doesn't work. Will any one tell me how i will get refund.