Our ph system has changed a few times over since the move. And so have the staff. If you get the front desk, they should be able to re-direct your phone call to where it needs to go.
If you get to a voicemail just leave your last name clearly, preferably a reference number, a phone back number and a short message as to why you're calling. I come to my desk and answer 40-60 voicemails on a daily basis now. I will get back to you but please leave me a contact phone number! If the voicemail is full, try again tommorow or the next day.
Oh and don't forget to update your phone number, home address and e-mail if it changes. Last thing you want to have is the File Manager call to give you an offer and they can't get a hold of you (trust me, it happens).
Main reason why we can not return calls is becasue we have nothing to pull up on our computers. If you say "Hi this is Joe, call me back!" then which Joe out of 120 are you?
Again, Last name, first name, reference number (if applicable), contact number.
I'm sure by following these few tips you'll get a better response time. I know, becasue I make these calls.