Не могу изменить тарифный план!

try a different updated non-opera browser.  https://helpx.adobe.com/manage-account/using/update-billing-information.html

Moved discussion to Account.............forum.

There's also a 'Chat' button on the page @Rag and Bone references.

Not the right forum, but look at this page for info. (Sorry, I don't know how to find the help page for other languages.