Bharti Airtel — Credited my check and later told me connection is not possible

Address:

Gurgaon, Haryana

I requested for IPTV connection and airtel executive asked me to pay amount in advance i paid amount with check after payment got deducted from my account they told me that it is not possible and after requesting multiple times i got my land line disconnected but no clue of my refund. They are doing froud with innocent customers and no commitment from Bharti Airtel Side.