Airtel — Broadband connection Issue/Refund

Address:	D-182 okhla
Website:	www.airtel.in

I was interested in airtel broadband plan and paid them Rs 5309 online. I was given assurance that my connection will be active very next day of my payment. Though its been 8 days now and the sales guy has stopped picking my calls...airtel is not even refunding my money as order cancellation has to come via same sales executive who is not picking up my phone.
My registered nmbr: [protected]