Cancellation

Hi community,
I have a strange situation here and feel really dumb because of it. Just now I opened an Adobe Account using a temporary email adress. But during the setup progress, I acidentally closed that window, so now I have no access to the email anymore. But I can't log into my Adobe Account either, because it wants some code to confirm my identity first, which it sends to the email adress, which i can't access.
Sooo... how can I either access or cancel that account (I have both the email & password for the acount)? I don't want them to start booking a subscription fee...