It is more than just the cables!
The short list of issues you MUST resolve are: Dish location, cable run outside, cable entrance, cable runs inside the the apartment, receiver location. You have to have enough electric outlets nearby for the TV & receiver + any other accessories. The rig should be connected to a land line phone & recently the internet. It should be grounded within ten feet of the cable entrance to the main building electric bond. Holes in exterior walls should not leak after the cable is in them.
Some of these items can be skipped and some are deal breakers. Using the existing cable is a good practice if you can do it. The building management owns it but often has a deal with the cable operator to keep tenants and sat techs from touching it.
There is hope, however. IF someone else had Directv in your unit you can redrill the patched holes and rerig the installation. Whatever you come up must be put into a written permission from the property owner before Directv will send an installer.
Good luck,
Joe