I totally sympathize, CS sucks, and I've been fortunate never to have to deal with it. However, time is money, so as much as I think Tesla CS is wrong, I'd just suck it up and pay the $100 for the seat fix. It's definitely a safety issue and they should have fixed it no questions asked. The second issue, was fixed. I've been to enough car dealers to know that it can be like pulling teeth to get them to agree to fix something sometimes. Third issue, I'd search to see if it's happened to others. Sounds like the car is in deep sleep, and won't wake up. Could it be your phone? Try the keycard to see if that'll get the car to function. Is it plugged in all night?
I had a 2016 Chevy Volt which I traded in for my Tesla. I liked the car alot, but I'm not so sure about the CS. They called me all the time for my oil change, when the app was showing I had about 1000 miles on the engine. Then I'd explain to them, that there's an app that shows you, blah blah blah... Owning the red-headed stepchild at the dealership did not appeal to me.