Confirm that you entered your email address correctly. Email addresses are not case-sensitive, but extra characters that may have been added by mistake can prevent an activation email from arriving in your inbox. Check your spam, junk, or similar folders if you do not see the email.
If the issue is not resolved, for account & billing concerns, it may be more effective to get help from our Billing team. You can contact them here then choose 'Account, payments & subscription'. They are the best ones to help you out with that matter.
I hope this helps. Let us know if you need anything else.