Have Begun Getting Hundreds of Spam Emails in my Xfinity Connect Inbox Every Day

All coming from Google, all look to be from the same spammer. I've created dozens of filters trying to reject these including rejecting all incoming mail from Gmail, and none have any effect. I am unable to get any help whatsoever with the garbage automated system. I've been a Comcast/Xfinity customer for decades but I'm cancelling after perhaps two more days of this.