@riser: Anna Nagar West
"As per your concern, we are unable to provide billing adjustment as your current plan is active under Airtel-UL-POWERDATA 3000 500GB (16Mbps/512Kbps) COMBO Plan and the bill has been generated correctly on pro rata basis.
Please note that there is no unlimited free std and local calls component activated for your airtel account number. Further If you wish to activate 99 Top up unlimited local and std calls write back to us with a line of confirmation."