Can anyone explain how to kill wavedir.com spam?

Well they might be an actual company but they still need to be blocked by Comcast. An actual company would honor your unsubcription from their mailings, yet even with filters in place I've gotten one email a day from them for the last two days. I've gone to their webpage and unsubscribed which I figured was going to be the wrong thing to do, but hey Comcast says they're an actual legit company so what could go wrong? Oh let me see, how about triple amount of wave dir emails in my inbox. So I created a filter for them and then I get one every so often.  So that bears the question, is Comcast an actual company? Apparently not they seem to not care about their customers and allow this legitimate Romanian company to keep sending us unwanted emails. Makes me wonder if someone at Comcast isn't actually working for wave dir. as our filters don't work 100%.  One filters I put in place is because Comcast keeps putting email I signed up for into the spam folder, I built a filter to keep it yet and it still goes to spam. Makes me think again the filters are just there to act as the placebo effect.