Ok, so back to the thread....................
C, I understand your frustration. We deal with this too. I have done several different things to get the message across. Get a phone number from one of your co-workers. If you can't get some one to answer in the office call the co-worker and have them put the sup on the phone. The other thing that I do is call our other center. I tell them I can't anyone to answer in our office but I need to get the message to someone. If those things fail then I go to the next step. I have the phone numbers for the sup's sup. Tell them the same, can't get anyone to answer and need someone to get the message.
Be creative, and maybe texting is being creative but it's not enough for me. I need to know who it was that I talked to and when. I don't trust them enough to use texting.