COX scam e-mail

I have an iMac and use AOL e-mail. I have COX Internet  I keep getting an offer from COX for a $1000 gift card from Walmart for my loyalty. Obviously this is a scam. I can't get rid of it unless I delete the web page it comes in on, walmart.giftcards1.online. It keeps returning after using AOL mail for 4 minutes or so. Is anyone else getting this? I don't know what to do about it.