Unfortunately we do not have the possibility to merge two or more user profiles on Trustpilot. Instead your only solution is to delete one of them. You can read how to delete your user profile here.
Please remember, we can always help you change the email address connected to your profile. So if you have all your favorite reviews under one profile, but your preferred email address is connected to another, we advise you to delete the last one. To change your email address please contact our support team here.