Looks like you didn't qualify for the original loan and they arranged for a different loan on less favorable terms. Looks like you can take the less favorable loan or default and return the car. You could try to find your own loan but you probably won't do better than what they have arranged.
I got approval and all. I got approval email from Alliant. Then they said that theyt didn't like the way paystubs looked. That is the weirdest thing I have heard in my 15 years of buying cars and house. Had I known that before tesla delivered the car, I would have definitely done some thing about it. But Tesla kept me in dark. They kept on saying everything is fine. Thats what is interesting. And coming to default, not sure what I am defaulting on. There are no minimum payments to make.