Airtel — deducting data without using.

Respected,
I am mallikarjun. Airtel ph no:[protected]. I using this number since last 6-7 years there was no problems about this airtel company. But now a days it is probleming to me lot.

Yesterday i mean 23/12/2018 @ 11.46pm one message will come to my number that you have used 90% (1.4 gb/day) of your dail data.

After that 24/12/2018 @12.20 am another message will came that 100% of your daily data limit is used. After this internet opening is stopped.

After 4 min i mean 12.24 am another message will come that u have used your 90% of your daily data limit. How is possible.

Again @ 12.50 am one message will come you gave used 100% of your daily limit.

If i called to custmer care service they did not respond correctly.

Note: this is not first time to happen like this thats while i am raise this complaint
Please clarify this