@Jordan Gibbs, Thanks for posting in Q&A.
Based as I know, for shared device, the enrolled user is empty. So the "Enrolled user exists" will show not compliant. This is by design. For your situation, I think we can configure conditional access policy to filter the shared device to bypass. For example, we can use "profileType" to exclude the shared devices. Here is a link with more details for your reference:
Meanwhile, I notice you want to open case. Here is a link with the steps to open Intune case for your reference:
https://video2.skills-academy.com/en-us/mem/get-support
For the pay related, you can call the Phone number in the following location to see if it can help.
Hope the above information can help.
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