Vodafone India — Extra bill amount and proper bill cycle

Address:

Chennai, Tamil Nadu, 600125

Almost every month I'm getting bill of 3000 or 4000rs, my billing cycle is 20th of Jan to 19th Feb. But billed from 1st of Jan till 19th Feb. But data started bill from Jan 20th itself of cycle ended and again by 5th of Feb again new data cycle start. Current bill amount is more then 4000rs. When I call customer care they explain all bill and then I ask why more they will disconnects 4th continuously happens.