Having deleted my account months ago, I still keep receiving an email about one particular guy (who I don't know) wanting to become part of my network. I tried

Having deleted my account months ago, I still keep receiving an email about one particular guy (who I don't know) wanting to become part of my network. I tried their unsubscribe link multiple times, to no avail. First I just didn't want to have an account anymore, now I hate them.