Rose here from Shopify. Thanks for reaching out!
I'm sorry to hear that your store is currently frozen. Have you checked your inbox to see if you've received any communication from Shopify in this regard? Be sure to check your spam folder as well!
If you have, I would suggest replying to that email directly as that specific team will be able to assist you further. If you have not received anything regarding the status of your store, please let me know your store URL so I may take a deeper look into this for you.
I look forward to hearing from you.
The billing cycles on application are different from our 90 free trial. If you sign up for an application and their trial is 7 days, for instance, then you will be billed for the application according to the app developers billing cycle.
If I understand correctly, your account was frozen because you were unable to pay the subscription fee for the application SmartrMail, is that correct? Are you able to send me your store URL so I may take a look for you?