Ubuntu should have alternative methods for donation. Paypal is very good for international donations or an ideal payment service.
You do not have to actually have a PayPal account in order to donate using PayPal. You can use your credit/debit card to donate. After clicking the "Pay with PayPal" button, you'll get another screen. Click "Pay with your debit or credit card as a PayPal guest." here Click "Dont have a Paypal account" option and continue.
Now, if you just hate PayPal, and refuse to use it at all, I can't help you there! :)