Adode Digital Editions and Kobo Aura

I suspect the issue is that you have tried to activate Digital Editions on too many devices at the same time. Generally speaking, Adobe's license allows you to install a product on multiple devices, but it can only be activated on 2 at any time and you can only be using it on 1 device at a time. I don't recall if that limitation includes mobile devices.

Let me move this to the Account, Payment, & Plan forum for you, which I suspect is the more appropriate forum for your question.

The Using the Community forum is for help in using the Adobe Support Community forums, not for help with specific programs. Product questions should be posted in the associated product community.

You can also try contacting Customer Support for assistance. This is a public forum, not Adobe support. Users, including the ACPs and MVPs, can't provide support for account, subscription, billing, download, or product activation issues. Support for those issues requires an Adobe employee.

Click the following to contact Adobe customer support staff for help: 

https://helpx.adobe.com/contact/support.html

You must be signed in with your Adobe ID and allow cookies in your web browser for this to work. Disable any ad, pop-up, or script blockers.

This is the link to the US website. If you are not in the US, the site should redirect to the page appropriate to the region associated with your ID.

Click the chat icon at the bottom right of the page to open a chat session. Typing AGENT into the chat window should connect you directly to a CSR rather than the AI.

If the CSR refers you to the forums, insist on speaking with a supervisor and keep moving up the chain until you get someone who knows what they are talking about.

You can also search this page for a regionally appropriate phone number for customer support.

https://helpx.adobe.com/contact/phone.html.

Be aware that because of the pandemic, wait times are far longer than usual due to reduced staff and higher demand. Please be patient with the people to whom you speak. Like you, they are feeling a great deal of stress. A little patience and understanding will go a long way to helping you in your particular situation.