When the Spirit is trying to convict you of some error, He will tell you. If you don’t listen, He will send someone who loves you to tell you. If you don’t listen, He will send someone who doesn’t love you to tell you. Just in case, when you are being accused of some evil by someone who would not want you blessed, ask the Spirit if He sent them.
If you are not convicted in your heart of error by Him, then the accusation is just something that is in the accuser’s life that they are hating you for. Don’t let it become a weight. Pray for them to be set free.