If you're a California resident and are affected by the price changes, you can file a complaint with the California Attorney General. If you're a US resident outside of California you can file a complaint with the Department of Commerce as well as the antitrust division of the Department of Justice. And if you really want to get revenge against ICANN you can contact Senator Ted Cruz's office and let them know what you think of ICANN's recent actions since their 2016 IANA takeover. He was the loudest political voice to oppose it when it happened.