That's strange. My final invoice definitely has CPF1 on, and my car tells me my premium subscription expires next year when I would've expected it to.
Taken from Teslas web pages. (you have to look at the HTML)
{"code":"$CPF0","description":"Standard Connectivity","group":"CONNECTIVITY","long_name":"Standard Connectivity"
{"code":"$CPF1","description":"Premium Connectivity","group":"CONNECTIVITY","long_name":"Premium Connectivity"
Wasn't it the case that cars the SR didn;t have premium and the more expensive cars did and then they changed them all to subscription with the only difference being the length of the free trial? I'd be arguing in your case, especially if you were one of those that ordered before they changed the website, that you have inclusinve premium.