M.H.
Hi there - keep the texts and report her to the police for harrassment! Tell her that you plan on doing this if she continues and if she does do it.
Also, check out the custody arrangements - if she is a drinker and is telling your daughter things, tell your ex that he will not see his daughter at his place anymore. Its not a healthy environment for her at all and will do her some erious emotional harm. Goodluck ;)