Tata Docomo — dive in alerts every 2 seconds

Address:

Pune, Maharashtra

Getting dive-in flash alerts every 2 seconds with cancel and OK button. The alert does not go away even when cancel is pressed. Have to click outside the alert box to make it disappear but the box reappears almost every 2 seconds. Making my phone unusable. Called 121 where they asked me to disable flash messages but can not find any such option in my phone settings.