Vodafone India — my data pack monthly charge was raised from 50 to 199 without informing me

Address:

Bangalore, Karnataka, 560102

When i subscribed to vodafone in december 2017, the postpaid plan that i chose was talk299 unlimited. Which has 299 per month as rent and 50 per month for 3g/4g. This adds up to 349+plus taxes+extra usage.in june 2018 without informing me the charge for data per month has increased to 199 per month. This went on for 4 months without my notice. Now out of nowhere a value added service spuul got activated and i was charged 150 rs per month. Is this how you make money by sneakily increasing the amount or adding a service without a confirmation from the customer. Is this your business model. I want all of my money that i paid extra back!!