You bought it in May and they say they won’t support it any more?
May I suggest you drive it through their showroom window to subsequently stick the key up the service manager’s bottom to get their attention???
Seriously:
Don’t follow my advice. While that may look like fun for about 10 minutes, the police will not agree.
They HAVE to fix it – It is a new car!! Sounds like you may need to look into the lemon law for your state.