This is Finley from the Social Care team at Shopify.
Thank you for reaching out and letting us know that you have tried to access your account on multiple devices but still have this problem.
Normally, you would be able to access your account by logging in and selecting a plan.
We'll need to access your account to resolve this issue. While we’re not able to provide account-specific support via the Shopify Community at this time, we’d be happy to continue assisting you through live chat, email, or callback. Please visit https://bit.ly/3cJkx8V and log in to your account to create a support request.
Since this is the next step, I've marked this reply as the solution for the benefit of others who may discover this topic. Thanks!