Builders Warehouse SPAM

I find it very ********* the way that it is virtually IMPOSSIBLE to unsubscribe from the vast amount of mail that gets sent from Builders. The unsubscribe link on the mail takes you to a page riddled with errors and I'm beginning to think it's designed that way so people con't get out of there mails which I will now call SPAM because of there is no way out of them. I have contacted support... no reply. What a ********** way to keep an email base. Shame on you!