Regarding issue 1, I had the same problem with my brand new car. It was just fixed this week after two months of hassle. I can tell you that in my case they replaced the modem completely under warranty at the dealership. In your case it sounds like you may have to do it yourself. So assuming...
Having the same issue. Actually bought the car without being able to connect since when I showed up at the dealer 200 miles aways awaiting a fix wasn't an option.
The dealer I bought from, same as OP, applied to xplan discount without issue.
I get the frustration everyone is having. I definitely saw the same frustrations before i saw this post. The pricing is all over the map. Keep trying, you may get lucky.
Super thankful to @monsterlag for...
I'm a day away from picking up my ER Lariat thanks to monsterlag. I must have spoken to or emailed 15 different dealers and I will say the pricing is all over the place. If anyone is in the northeast, feel free to reach out to me and I'm happy to pay it forward. I'm at 52k out the door.