When I am going to a supercharger I've never been to, I turn on the satellite view overlay and zoom in on the destination and make sure I can see the location of the chargers within the parking lot. Helps avoid frustrations.
Also, on that breaking the window thing - I've sold a few teslas and I tell the buyers to get the car in their name as quick as possible, but in the meantime to call me if they need something done with the app (like unlocking the car remotely!) and I'll do it for them.
sorry about your $500