Let’s Find This Michelle
When you receive a wrong-person text from a strange number, the kind to do would be to tell them that they texted the wrong number. If they text you again sometime in the future, maybe they made another mistake. After all, people make mistakes all the time.
But when the third wrong-person text comes in from the same person, then someone is probably screwing around with you. For some reason, the texter saved the OP’s number under the name Michelle, even though they had been warned twice that they were, in fact, not the Michelle they were looking for. Maybe the third time’s the charm, right?