Hello @H.F.T ,
I'm afraid I'm not able to recreate your issue, when I go to register in your event, this is what's shown:

Anyone that doesn't have a PayPal account can simply click the "Pay with Debit or Credit Card" option. If they have an email address that PayPal automatically recognizes as already having an account they may be prompted to simply login, but even when I use my legitimate address that does have a PayPal account, I'm still given the option to either login or take the second option.
If one of your registrants decided to create a PayPal account, they'll need to reach out to PayPal's support as we have no way of accessing that info or troubleshooting it.
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William A
Community & Social Media Support
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