Vodafone Prepaid Mobile Services — Unsatisfied with vodafone

Address:

South Delhi, Delhi

I have a vodafone connection of no. "[protected]" since May 2010. I have registered for DND services in May itself. But even then I am receiving adds via messages & phone calls related to stock market, flats and insurance etc.
The other problem I am facing is that the no. "[protected]" i am using is earlier registered with some other customer "SHAMIM MOHAMMAD".I am receiving phone calls related to him regularly from ICICI life insurance, Airtel particularly and others also.
I have already complained to Vodafone but I am still facing the problem.