I know this has been a tough and trying time for you to contact our support team and I'm here to ensure that I'll be able to address your concern, RAB5.

Due to COVID-19, we have limited staffing and have reduced our support hours from 6 AM - 6 PM PT Monday - Friday. You can contact them on weekdays to make sure you'll be able to talk to one of our representatives. We will resume normal hours as soon as possible.

On the other hand, the message that you received about the expiration date means that your QuickBooks Desktop version has already been discontinued. To keep your account working, upgrading it is the only solution so you'll be able to access QuickBooks. And it's a good thing that you're done with the upgrade. However, it seems that you're still experiencing issues in accessing your company file. You can verify if your current system supports the latest version of QuickBooks.

You might also want to check out this article that provides FAQs about service discontinuation: QuickBooks Desktop Service Discontinuation Policy And Upgrade Information.

For your additional reference, you can check out these help articles if you have any questions related to QuickBooks. 

Fill me in if you need further assistance. I'll always be around to help you, you can reply or comment below.