Airtel — Irregular deduction of balance

I have recently observed two balance issues in my account.
1. I recharged my DTH account [protected] on 14th dec 2015 with 510. It showed validity till 13th Feb that time. However later in Feb, it started showing validity till 9th feb. So there was extra loss incurred someday.
2.Also, on 9th Feb My account balance showed Rs. 23. I however made a recharge of Rs. 320(15 cashback), as it showed the last day of validity period. So my total balance would have been Rs. 358 on 9th. But on 14th, my balance is 288, which is Rs. 20 short, as per Rs. 10 deductions/day of my current pack.
I want to know my balance history of the days, so that i can get to know when did all these balance descrepencies occur, and when did others of such type occured...Also, I want a refund of that amount. My contact no. Is [protected].