What was inaccessible to them: The service itself, or any means to contact the merchant to cancel an ongoing subscription?
I can imagine a merchant to win a chargeback if a customer e.g. signs up for a service using a VPN that isn't actually usable over the same VPN and then wants money for their first month back.
But if cancellation of future charges is also not possible, I'd consider that an instance of a merchant not being responsive to attempts at cancellation, similar to them simply not picking up the phone or responding to emails.
I can imagine a merchant to win a chargeback if a customer e.g. signs up for a service using a VPN that isn't actually usable over the same VPN and then wants money for their first month back.
But if cancellation of future charges is also not possible, I'd consider that an instance of a merchant not being responsive to attempts at cancellation, similar to them simply not picking up the phone or responding to emails.