Can't upgrade to paid plan

I’m trying to upgrade to a paid plan, but when I click the links, the following page is displayed. How can i upgrade to Pro?

Hi,

Sorry for the trouble!

Please send an email to contact@invoiceninja.com and we’ll try to help.

Hi,

Same problem here. I already send an mail, never get any answer / reply

It’s possible the email is in our spam folder, if you can send me the subject I’ll search for it.