"Sorry. We know that you were paying us monthly/yearly for the service, but you've been inactive for too long. We're going to deactivate your account"
That doesn't seem right to me.
Alas, that doesn't matter - what matters is the contract you agreed to when paying them.
"Sorry. We know that you were paying us monthly/yearly for the service, but you've been inactive for too long. We're going to deactivate your account"
That doesn't seem right to me.