Airtel — providing unfair data

Address:

Bidar, Karnataka, 585402

I am currently on 3gb/day data plan.
Every night after 12:am my data pack renews and give me 2.7gb instead of 3gb.

This is happening from past 3 months.

My airtel number is [protected],

Every night my data pack renews at 12:00,

Immediately after that i refresh my account and i see 2.7/gb data available out of 3gb. There is no account for missing data. Even though i don't use any data for 1 minute my data balance keep on reducing.

Kindly address my issue.

Regards,
Kirankumar d s