You’ll need to try Norton support again or dispute charge via your credit card/payment method.
Where/How did you purchase Norton Utilities Ultimate. Maybe, the key is region locked.
What happens when you try to activate. Can you sign in at Norton Utilities Ultimate?
~ may be related:
Norton Utilities purchased but can’t be activated
https://community.norton.com/t/norton-utilities-purchased-but-cant-be-activated/399456
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