BSNL Broadband — one gb usage is consumed miraculously fast as compared to used in mobile

Address:

Gujarat

i have used bsnl broadband services since two to three years.simultenously i also use internet on mobiles with various networks like tata,uninor etc.
i find one thing alarming that in bsnl boadband 1gb of free usage consumed in avery fast as compared to usage that utilised in mobiles schemes i dont find the reasone behind the event.but i want to try to get attension from the so called SAHEBS OF BSNL.SOMETHING IS GOING WRONG IN
DATA MEASURING SYSTEM OF BSNL.
TIRED FROM THEIRE SYSTEM NOW I HAVE DROPPED MY BSNL BROADBAND CONNECTION NO.[protected] AT DABHOI.391110