Here we can offer buttons like cancel go back and so. If you go the way I propose, the payment request page can be very small page like follows we maybe can use for all the payments (yearly and once) or we make different pages:
Zahlungsanforderung (Payment request)
Sie haben den Premium Zugang für die jährliche Zahlung gewählt für Vorname, Name, email. Hier können Sie die Zahlung abwickeln.
In English: You have choosen the premium access for yearly payment for full name, e-mail. You can manage payment right here ... Probably this text will be enhanced later also.
Payment status
and so on
Paypal button
Wenn der Zahlungsvorgang abgeschlossen ist ...
Some additional text like thank you, advise if something goes wrong shoulöd be added. How the process goes on, if user can go back and so on