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:
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.