Frustrated with BCBS TX! HELP!

I am beyond frustrated with BCBS TX. My paperwork was submitted for pre determination on 03/14/2018. I have called every day since the 15th to check and see the status. I have had the pleasure of talking to some customer services reps more than once a week. Today I called, this makes my 12th business day, I talked to a very nasty lady on the phone. My paperwork is still in the review status. I asked the lady if she could tell me how much longer it would be, "Well like I've told you the past 8 times I have no idea!" She was so rude. I told her I have the right to call and check on the pre determination. I asked to speak with her manager and was refereed to a patient advocate. I expressed my frustration and she had my pre determination escalated. Has anyone had this happen before?