You probably booked a package via AAA and it would be difficult, if not impossible, to change. You can always call them and ask.
This happened to us a long time ago when we used to use AAA for our trips. It came with Mears but I went ahead and booked a town car service because I will not use Mears. The cost was really small so I just let it go and did not use the Mears part of the package. You can go ahead and book any car service you want outside of this AAA package and ignore the Mears part like we did. Maybe AAA can remove Mears and refund this amount.