Idea Cellular — idea flash notifications keep coming

Address:

Hyderabad, Andhra Pradesh, 502032

Dnd activated, i have requested to stop idea flash messages but customer care
Says they can not stop sending flash messages from idea side, only option is to request mobile phone (Iphone x) service center to block all flash messages in my mobile. They keep coming continuously even after dismissing it. It happens for 8mins continuous and after that it stops. It happens many times in a day. If it is not dismissed, the screen wont turn off and my whole battery drains!

I have attached a photo about that message that keeps coming.

I have also attached a picture which idea suggested me to do and i did. But still i'm getting!

The messages only come when my unlimited pack or internet has expired. It is like forcing a customer to take up the pack.