Then you should have posted and sought out assistance here. They have ways to unlink an old wallet to free up a new space. The form is at Wallet unlinking request form
You can see more about that at Unable to re-verify wallet - #118 by Mattches
Though you used the word “suspect” instead of “assume,” it sounds like you’re doing the same thing. And you know what they say happens when you assume, right? lol. If they haven’t explicitly mentioned any issues, then I would suggest you reach out to them to ask. Don’t tell them what you think you did, let them tell you.
They should have told you a place to contact when they gave you a notice. But if they didn’t, I’ll refer you back to a response from Steeven not long ago.
So that’s one option and the one I highly suggest you do. The secondary if you really need might be to refer to the Terms of Service at https://basicattentiontoken.org/publisher-terms-of-service/
To quote them:
If you have any questions about these Terms, please contact us at [email protected]