I changed my plan on 10th of this month from 500combo(1.5gb) to 545 unlimited.I checked the sdc selfcare portal and the new plan's status was "active" in 2 days.Also the chargeable usage remained stagnant since the new plan was activated.Now i have used data accordingly(17gb) and it has come to my notice through various websites that i will be charged as per the previous plan and new plan will only be activated from the first of next month.Kindly inform as to how will i be billed.