After surgery?

I had ankle surgery after a fall. I was given a plaster cast which means I can't walk or put my foot in it for at least six weeks. Normally I'm able to walk with two forearm supports during this time, including up and down stairs. However, I can't because I don't have full strength in my arm due to an older injury. The hospital prescribed me a walking frame and a mobile toilet chair so that I can at least be somewhat mobile in my apartment. My health insurance company paid for a 14-day transport service, but this has now expired and I won't be able to make it to my next check-up appointment for follow-up care because I still have two screws and a plate in my ankle which won't come out for about six weeks. I'm not able to go to the appointment alone or with forearm supports because the health insurance company won't cover the cost of a transport service after the 14 days are up. The same thing happens. I should get a referral from the orthopedist, but I have the same problem. I can climb the stairs here in the house and go down the stairs to the orthopedist with my walking frame or commode. They can't come into the house, of course. Calling the orthopedist won't help; they want me to come over, but that's not possible for me. I'd be delighted if it were possible. So I can't make my follow-up appointment. Everyone else is completely up in the air, just like me. Does anyone have any advice for me? Thanks.