@Connor119 I don't know what's going on here, but it isn't the host's responsibility to cancel when the guest wants to leave. A host cancellation is only warranted when the host can't fulfill the booking for some reason.
Ask the host whether they cancelled the booking, as Airbnb claims, or if he is waiting for you to cancel.
If you haven't received a cancellation notice, the booking is still active and the host's calendar is still blocked. The host may have agreed to a cancellation and refund, but that doesn't mean the host has cancelled, and they most likely wouldn't, as hosts receive penalties for cancelling.