Idea Cellular — 300 mb 3g data gone within 10 min after recharge

Address:

560099

As soon as I recharged with Rs. 103, I got 300mb 3g data, and in next 5 min 200 mb data is deducted. I called customer care, but it was of no use. I double checked that all my background processes were off. Moreover, background app refresh was already off. Data was turned on ONLY for whatsapp process.
And still, in next 5 min, without doing any activity, I lost remaining 100mb as well.

P.S. : 300 mb is good for me for whole month. For last 2-3 months, I am using using the around 300 mb for 30 days. Added Just to show my usage.