Airtel — excess payments made

I had successfully charged my mobile online on[protected] for rs.448/- for 82 days plan. Trans id[protected]
Today[protected] by mistake my friend charged my mobile for rs.199/- for 28 days plan. Trans id [protected]
I request you to kindly adjust the excess payment made by mistake with the earlier recharge and extend the number of days accordingly or give me refund of rs.199/- and oblige.