[Resolved]  Tata Indicom — Getting sales/marketing calls and SMS in spite of DND

I had registered for DND at the time of taking my Tata Indicom phone connection, almost 2 years ago.I have been getting sales/marketing calls and SMSs ever since.I get calls from banks, credit card companies, holiday resorts, MBA institutes, and almost every product that can be sold.I get these calls and SMS at odd hours.There have been times when I have repeatedly told the marketing company representative that I do not require his product.Yet, they call and trouble me.What I would like to know is that is there a forum that I can approach with my problem, and get a resolution?If I have registered for DND, am I not supposed to be able to avail this facility?Was the entire concept of DND just a sham?Tata Indicom has the cheek to print the feature of DND on their bill for the month of May-June.I want to ask Tata Teleservices and the Government what is the purpose of printing the DND thing on the bill copy, when the feature is a useless piece and is just to make an utter fool of customers?Frankly, I feel that whatever problem I have written above will not have any resolution, and my complaint will remain a problem, forever.