Compare Dth / Vserve eCommerce Sales & Service — paid money for new dth connection on 06 may but no response

Address:

house no.3/20 1st Floor Old Rajender Nagar delhi-110060, New Delhi, Delhi, 110060

Have made a booking for tata sky dth connection through above company.
They asked to pay 1790 odd rupees online for booking, which i made online.
Company confirmed they have received the payment and technician will visit within 4 to 24 hours.
Till date no one has visited, have asked for refund and send numerous mails, but of no use.
Their call center people disconnect the phone whenever i have called them for refund.
The government says we will make bhratchar mukt bharat, how do i belive when companies are befooling customers like this??
Have made them payments through paytm which they have acknowledged also. Request your intervention enabling me to fet back my money.