Hi, @LHorne
Thanks for providing the additional information that it was the annual invoice, not the monthly. In that case you should have no problem receiving a refund.
That being said, I do want to clarify that you weren’t paying for another subscription in order to cancel. If you select a paid plan and the charge date occurs, but the charge doesn’t go through, Shopify doesn’t automatically close your account. As these are operating businesses we allow for a grace period. Thus, your plan had started, and you were paying for the plan that was activated on the date your bill was due, which was selected previous to the billing attempt. This was not a new subscription.
The billing is automated based on the plan you select when you create your account. Thus, cancelling it before the billing date prevents any and all charges.