[SOLVED] changing my game handle

I started the game with an old game handle, then went to the Microsoft Store thingy and bought a name change. All my profiles updated but in Forza Horizon 4 i still have the old name. How do I change it?? or, alternatively, how do i reset my game progress to start over with the new handle??
thanks for your time

It took a couple more hours than all other profiles, but Horizon 4 has updated the gamer tag to the new one.