Vodafone India — telemarketing calls

Hi, i am getting at least 4 calls per week from vodafone india. I switched my number from vodafone to airtel last year, so they have my contact details. My number is on the trai dnd list and i have mentioned that so many times to these cold calling agents but they do not understand. How can you help me to resolve this breach of privacy

One of the numbers is[protected]