Airtel — incorrect broadband consumption

Address:

122018

Airtel is fradulently claiming that we are consuming more than 150 gb every month since we moved to a new house and bought their connection. That too when the property is locked and we are living elsewhere. I spoke to airtel today and they said they can't do anythign about it. I renewed my plan and bought additional 5gb data today but they said my modem isn't working and they would send the technician. By the time technician arrived (In 4 hours from my request), even 5gb was consumed (Without modem working)

I called the customer care again and the ivr said consumption is 120 gb, while in the morning ivr said 170 gb consumption. The technician as well as the customer support is not willing to help at all and invoicing us for no mistake of ours.