Airtel — registered for do not disturb but still getting spam and promotional messages

I am an airtel customer and i have registered my mobile number for do not disturb (Dnd) service to stop unwanted promotional sms which i don’t want to receive.
My dnd registration no is w[protected]. Even though i registered for dnd service which is still in active status, i’m still getting promotional sms. Airtel didn’t taken action to stop promotional sms for dnd registered user. Some sample screenshots for reference. I want airtel to take action to stop all kinds of promotional and spam messages from being sent to my mobile number.