Big Bazaar / Futurebazaar / Future Retail / Hometown — promotion messages

I don't want to receive any promotional message from big bazar. I have already massaged dealz no to 575758. But it replies "dealz is an invalid keyword. Please use the correct keyword and try again." my mobile number is [protected] and my mobile no is registered in full dnd.
Please resolve the issue or i am going to file complain in consumer court.