When you have an email address associated with your work that will be given out to people in order to contact you, try, I don't know, answering it.
I shouldn't have to wait a month, email you again, wait another month, email you AGAIN, then finally call you (when you're not there, because you're never there) and leave a message to get you to FINALLY ANSWER MY EMAIL.
Email is not phone-activated.
(P.S. I suspect it's about to happen AGAIN...with a completely different person. What is wrong with people? I'd understand if your email was down, but it's obviously not because as soon as you heard my message you hopped right to it with no apologies about taking three months to get back to me. Didn't bother calling back, either...just the email. In response to the email I sent...about a month ago. So it's not like you didn't get it. There are no excuses.)
(P.P.S. I know it's my own fault that I work nights, and you just happen to come into the office at noon when I am sound asleep snugly in my bed, but when I finally go to the trouble of calling you in the afternoon when you are there, it doesn't help that the office closes at 1pm and I can't reach you for the following 6 hours, though you are supposedly in the building. WHAT AM I SUPPOSED TO DO. I DON'T HAVE YOUR SUPER-SECRET PAGER NUMBER/BAT SIGNAL.)