do not disturb service is not working

Location/place: jind(haryana)

Name of company/service: tata docomo

on 2nd june , i have applied for DND service but its not working . every day i am receiving a lot of messages on my mob even after complaining to customer care ?
the customer care officers requested me to just ignore such type of messages ……

my contact no. on which i DND is not working is 9812120471