Hmm...I guess it might be a problem if you use a different e-mail address for PayPal, but I'm not sure. Do you have access to the PayPal e-mail account?
Anyway, from what you said, I'm not sure if your support request was to Amanita, but if it was, Amanita uses the Humble Widget for purchasing Samorost 2, so you might want to try contacting Humble Support. You can use this form:
https://support.humblebundle.com/hc/en-us/requests/newAnd please post back once you hear from Humble Support, as it may help others on the forum who have a similar issue. :)