We understand. Thank you for the information. In this case, this could be a software issue. We recommend to backup your contacts, files, pictures, etc. and try dialing a factory reset. A factory reset will erase everything on the phone and will also reset the software configuration fixing any errors. Please tell us if this is an option for you so we can tell you how to do it.
So sorry to hear that, @Camd42788. We definitely want to get this figured out for you. What error are you getting when trying to send text messages? Are you using the default Messaging app or a third-party one? Are you able to receive them?
Understood. We suggest you try to clear the data and/or cache of the Messages app to see if that works. Please, know that this process will delete the messages and can't be recovered. Go to Settings > Apps or Application Manager > All > Messages.
How long have you had this phone?