Just had my water heater installed. For some reason I have no water going through my hot water lines at all. None. I have cold water running through my cold water lines. I looked to see if there are any shut offs for the hot and there are none. He said he will come back tomorrow but I need hot water today.

It's standard procedure to install a shut off on each cold water feed to a heater. Every first year plumber knows that. Check the cold water line to be sure. If the installer turned on the power to the heater without first filling the heater he's burned out the elements.
You have no pressure on the hot water side? Didn't the installer check his work? That's simply unacceptable , P{leas let me know what the installer, ( I have a problem calling him a plumber), finds. Good luck. Tom