Sorry you had your pump taken away from you, and are struggling with control again.
Were you downloading info from your pump regularly, so that your team could see how you were doing? Did you ask for a telephone appointment instead of a face to face one? During the early days of the pandemic this is how all my pump appointments happened.
Does your area have any volunteer hospital drivers, or schemes such as Dial a Ride, as you can't be the only person to find it difficult to get to appointments?