Text from debt collector

Hi!  My daughter is getting text on her mobile phone from a debt collector, but she has never had an account.  I’ve tried to contact Xfinity through the phone numbers and they can’t find an account for her either.  My account is up-to-date and payments and I’m on auto pay.  We’re trying to get a resolution to this, but we can’t figure out why she is getting these debt collector texts.  Coming from 266278.