These price increases by adtv is simply to loot customers. It's not correct to show service tax hike as a reason. Because s.tax is increased from 12.36% to 14%. Means hike is only 1.64%.
So if we take this as count, 1.64% of 25 is only 0.41 paise. So if they want to increase only because of tax hike, new price would be 25.41 rs only. But they increase by 5 rupees. So how it is fair from adtv?