How satan can say that?

he was with a woman guiding her as a prophet and she gone. he becames aggressive and possessed. one month later he has contact with another possessed person that told him , no matter Jenny will destroy you. how does that s possible? and months later she reappeared and started to stalning him in an forum where he s evangelizing, contradicting, saying bad names, insulting, disturbing, attacking and mocking all of his life etc. thanks nice day.