Airtel — getting lots of sms even if fully register for dnd

Address:

Ahmedabad, Gujarat, 382481

Hi team, my airtel number [protected] is fully registered in dnd in couple of years, still if I again send sms to on 1909 for fully blocked service, its reply me that you are already regustered for "Fully blocked a category in NDND". i also complaints through sms on 1909(snapshot atteched), But still I am not getting any result for stop the sms.please find some snapshot for reference.
Please help for same.