Story stuck on tier B after 1st Race

I'm having the same exact issue, but while using the lamborghini. No matter what I do, I can't avoid this issue either. Doesn't give me an option on pc to delete my save game either so it's deemed unplayable right now. 

Had the same bug. I changed the bodykit and got to A+. Done some races and changed the bodykit again: BAM! Back to B.

Really annoying weird bug.

I got a refund for the game (steam). I won't play this game with a bug, that reverts your tier if you change something on your car. That is ridicolous.

@PUNI555I am also having the same issue. I have deleted my save game once already, and just realized this is where my car went from A+ to be.

Go to \Documents\Need For Speed(TM) Unbound\SaveGame\savegame and delete the save to start over if you want. I don't....

If I gotta do this all over again, I wont be playing the game any more. And am seriously considering dropping the EA Play subscription I have. Especially since it doesnt seem to support native Bluetooth XBox controllers either....

Edit: Found a fix. Go to the bodykit selection area, select the baseline non-upgraded body kit. There should be a revert parts button. On an XBox controller it was Y. Accept, and Class A+ again.

Seriously though, this is a pretty simple error that should have been prevented by hard-code.