How do i stop these pop ups? I DO NOT have the capital one extension installed, yet every page i try shop i get these pop ups from capital one.
It looks like you may have picked up a PUP, a Possibly Unwanted Program. While they are annoying, they do not cause damage to your system. Some people actually want the 'Features' offered by these programs. They are usually downloaded alongside a legitimate download when you do not uncheck the option for the additional download.
Norton products concentrate on malware that can damage your system, that is why some PUPs are not detected.
After a full system scan by your Norton 360, I would suggest a second opinion scan using the FREE version of Malwarebytes. You can find it here https://www.malwarebytes.com/premium/