Bharti Airtel — Wrong Bill generation for Airtel 4G Dongle No. [protected]. Account Number: [protected]

Address: Kolkata, West Bengal

Respected Madam/Sir, A bill is generated for my 4G dongle (No. : [protected]) of the amount 708.23 with invoice date as 21-MAR-2015. I am not sure why this is generated as I already have paid 6 months advance rental. i.e. Rs. 5730/-. My plan is of Rs. 850/- per month. So the amount which I have paid, includes the service tax as well. So I want to know the exact detail for this improper bill generation. At the same time I also want to know why my complain is not being taken by the Customer Care department as I have tried several times to do so, but every time they just keep me on hold for more than 25 minutes and then the call gets automatically disconnected. Waiting for a quick response.