Airtel — marketing calls/sms not stopped

Address:

500050

Dear airtel team,

Despite having registered for dnd vide registration# i[protected], i'm getting numerous marketing calls. I tried to raise a complaint in airtel web site, it always ends up giving a message that due to some internal server error, the request can't be processed at that time and to try again.

Can you please look into this?

Best regards
Bhaskar kotha