How to complain for DND not working?

Registering Complaints

If you receive any unsolicited commercial communications seven days after registration of your telephone number, you may register a complaint by:

• Dialing the toll free number 1909;
• or Sending an SMS to 1909
  • You may register a complaint regarding receipt of unsolicited commercial communications by sending SMS to 1909  in the specified format given below:

    • “COMP TEL NO XXXXXXXXXX, dd/mm/yy, Time hh:mm”
    • Where XXXXXXXXXX – is the telephone number or header of the SMS, as the case may be,from which the unsolicited commercial communication has originated
    • Example:
    • 1): You have received an SMS from DM-IAMU on 30th Sep’11 at 2pm. Then your complaint SMS will be “COMP TEL NO DM-IAMU, 30/09/11, Time 14:00” and send it to 1909.
    • 2): You have received an SMS / call from 9123456789 on 1st Oct’11 at 11.35am. Then your complaint SMS will be “COMP TEL NO 9123456789, 01/10/11, Time 11:35” and send it to 1909.
  • The complaint will be registered and acknowledged by MTNL by sending a unique complaint number through SMS
Please note:
• The complaint has to be registered from the telephone number on which unsolicited commercial communication has been received
• Your complaint must be made within three days of receipt of the unsolicited commercial communication

Registration of Preference/Change of Preference/ De-registration

• For registration of preference, send SMS in the format "START‹option(s)› " to 1909 e.g. to receive SMSs Option 'Real State' send SMS in the format "START 2" to 1909.
• For change of preference, send SMS in the format “STOP‹option(s)›"  to stop the existing options and “START‹option(s)›” to 1909

• For de-registration, send SMS in the format “STOP” to 1909
• Customers can choose to receive SMSs from multiple options e.g. to receive SMSs from options ‘Education’ and ‘Health’, send SMS in the format “START 3,4” to 1909.
• For registering option for "Fully Blocked Category" send "START 0" to 1909

You can register preference to receive messages from following categories:

• Fully Blocked Category (No Telemarketing Call/ SMS)
• Partially Blocked CategoryOptions under partially blocked category:

1. Banking / Insurance / Financial products / credit cards

2. Real Estate

3. Education

4.Health

5. Consumer goods and automobiles

6. Communication / Broadcasting / Entertainment / IT

7.Tourism and Leisure

Source: 

• http://mtnlmumbai.in/index.php/do-not-disturb
• http://www.telecomdiary.com/ti/do-not-disturb-register-dnd/dnd-now-ncpr-compliant-registration-procedure/