Medlife — 10-20 calls everyday on regular basis

I had ordered medicine from the site and now i am getting 10-20 calls everyday on daily basis. I have asked them to unsubscriber or put my number on DND, i have send 15-20 mails but status is still the same.
I have many numbers on my block list but they are calling from different numbers.
I am still getting 10-20 calls everyday