Sorry to hear that. This friend sounds like she’ll probably end up flaking out in you. Shes not an actual friend.

I’ve dealt with lots of flakes in the past. Do you know anyone who’s reliable at all? Can you ask a family member or a neighbor to help you out instead?

Choose someone who’s very reliable as you need someone to be there for you. If you have no one else though, try bribing her with a lunch or dinner at a place that she likes. Most people will do favors if thete is something in it for them.

Or offer her money. Let her know that this procedure can’t be done without someone present to drive you home or just be there for you.

I’d definitely try to make more reliable friends soon if I were you. Try joining meetup. Its free to join. Theres lots of online zoom events on there now and maybe a few outdoor ones as well.

You’re relying on her to much. Her response doesn’t sound good at all. It’d be better to ask a reliable person to help you out. They don’t need to be your friend, just someone who’d be willing to help you out.