Call back and press zero, ask to speak with a supervisor. I would advise to call back after lunch. We have time lines according to the dept of insurance in which we have to return phone calls in. If you are documenting all your calls that you have made, you can let them know that you called on x at x exact time, and have not rec'd a call back from x and would a status on your file.
Sorry I haven't been much help lately...I've got a grip load of claims these days. Some 7 car pile ups, serious injuries, and so on. They are getting all my time.