This is an account-specific issue, please consider sending an email to the merchant support team directly so they can look into the account.
Contact page link: https://help.shopify.com/en/questions#/contact/
The first thing I would advise in cases like this would be to check your account owner email address for any contact from our teams about the status of your account.
Try searching in your spam or other folders to see if any email contact has been filtered there.
Just got a reply from support that they reactive my store but they need me to select a subscription plan, but I already paid an annual subscription before they deactivate my store. That’s pretty strange.
Thanks for getting back to me here and sharing those updates.
As we’re unable to access or discuss your account info here publicly, I’d advise you to get back in touch by replying to that existing contact so you can check this out with our support team.
There we’ll be able to view your billing and plan info and clear this up with you.