On most internet browsers you can delete your cookies using 'Tools' or 'History'.
The links below can help you clear your browsing histories and Cookies to help you progress forward. Please choose the one related to the device or internet browser you are using:
APPLE - https://support.apple.com/en-gb/HT201265
GOOGLE CHROME - https://support.google.com/accounts/answer/32050?hl=en
INTERNET EXPLORER - https://kb.wisc.edu/helpdesk/page.php?id=12314
ANDROID - https://support.google.com/chrome/answer/95647?co=GENIE.Platform%3DAndroid&hl=en
Please note that if you have items in your bag or in the 'Save for Later' section that were added when you weren't logged in, you'll need to make a note of the product name/code as deleting your cookies could clear this history.