Aircel prepaid connection
DND activated but still getting disturbed

I, Deepak Ranjan Mishra having an Aircel Prepaid Number of Orissa (09853250760) have activated my DND services since more than a year. but every now & again I'm receiving promo SMSs from Aircel. Sometimes even at 4 Am in the morning & sometimes same SMS twice & thrice.

I've already complained about the same in Dishnet H.O. at Orissa & at the customer care but no actions being taken.

I'm very much disturbed & fed-up with this kind of service by Aircel but as I'm using this connection since quite a long time hence even can't surrender the connection even.