Airtel Prepaid
Validity problem

Dear Sir/Madam,

I am Using Airtel GPRS98, from last few months i am facing a problem of getting validity one day or two days less. Actually i did my recharge 0n 10 Dec with 98Rs at 8:00pm, but i am getting validity till 8th Jan It should be till 9th Jan. Please make a change on it, because i am facing same problem every month.