Idea Cellular — Idea Power flash messages every 10 mins

I have called Idea customer care for deactivation for " idea power flash messages " which risks unnecessary money deduction from account. ( had problem previously about 7-8 months ago while about 80 Rs. was deducted.) But they are just saying that " this can be done from your mobile with deactivation broadcast messages." but i had already done long ago but still sometimes i received same messages. And in last weeks number of messages have increased. I could not understand why this kind of messages are present even after DND activation. I really need to deactivate this service. [protected]