Location/place: punjab

my mobile no is 8699153195.tata docomo offers me new 2G internet pack of Rs.147,with 8gb data and 60 days validity.when i have activated and use this plan then they again detuct balanc from my acount for each use of data. actually i belongs to rural area and i dont know how to get rid of it. plese highlight some detailed leagel actoin that i can take against them.plz suggest me at rajatrockstar.choudary05@gmail.com