I would say "don't order me around." In this context, if you say "Don't keep ordering me," it sounds a little strange, almost like someone keeps ordering you off the menu at a restaurant or something (if that makes sense :) ) The only time you would really use "to order" meaning "to boss" or "to demand" would be like, "I order you to bring me that right now." Adding "around" afterwards sounds much more natural in this example. I hope that helps! :)