If another race starts using one of your trademarks, whether the trademark has been registered or not, you can take action to protect your rights. In fact, not taking action could undermine your case in defending your rights to that trademark in the future.
If you're tried reaching out to the offending race and had no response, or you have found the response you received inadequate, contact a lawyer specialising in trademark law. They should be able to advise on next steps (usually involving a cease-and-desist letter as a first step).