Airtel — Data consumption very fast on my pack

Address:

Airtel Bharti Ltd, Bharti Crescent 1 Nelson Mandela Road, Vasant Kunj, Phase II, New Delhi - 110 070.

I purchased a two months pack for Rs 480. This pack includes 1.5 GB data daily unlimited calling and SMS. Eventhough, Airtel company is calculating the data consumption very fast. 10 days back I came from Oman there, also I was using 2 GB 4G network for a month, I was using internet occasionally even then this was enough for me for a month.
When I came here in India 1.5 GB data is flying very fast just by using facebook, Whatsapp, few hours of web browsing.
Airtel is looting the people not by taking more money but by giving the less data to the customers.
Government should check their calculator by the expert people and take stringent action Airtel Bharti.