Airtel — installation charge not refunded

Address:

28th main , 5th cross, Kuvempunagara, BTM stage 2, 560076

Hello... I ordered for new airtel broadband connection, selected 100mbps plan and paid installation fee. While installing they stated max speed is 24 mbps in our area which was a dealbreaker for me so i had to cancel the request. I was expecting a mail or text from them about confirmation but haven’t received any kind of that sort and i don’t know how to track my request.
Please help in getting the refund