I've been subscribed to a UK based liberal democrat campaign and party news list for two years now. I have - responded to several fundraisers and party organiz

I've been subscribed to a UK based liberal democrat campaign and party news list for two years now. I have - responded to several fundraisers and party organizers asking them not to email me anymore - clicked the unsubscribe button/link when there is one(about 1/3rd of the time for some reason) - reported as spam - used various unsubscribe services/aggregators all to no avail. At this point every time an email gets through I just report as spam and manually add them to my filter.