Welingkar Institute Of Management — Constant messages

I am getting constant messages from institute people who wants people to get or refer institute program.
I have already replied several messages stating i am not interested in your institute program, still i get messages with new numbers everytime.
Don't you guys have system where it is updated who is interested and not interested?
Please stop messaging as it is too much frustrating every time these messages pop up when i have already replied several times about not interest in your program.