UNWANTED MAILS - SUBSCRIBE TO ALL UNAVAILABLE

Despite unsubscribing each time I receive a mail from Wantitall and despite emailing the company asking to be unsubscribed I continue receiving advertising material on a very regular basis. Each time advertising comes through by mail it only allows me to unsubscribe to that particular mail which means I am on their list whether I like it or not - AND I DON'T WANT TO HEAR FROM THEM! I have blocked their mails but they still come into my Junk mail and need to be deleted - which is extremely irritating!