i have a 2014 Genesis radio will not come on after replacing the alternator

The radio died while i was setting in the car, so i turn the car off restarted it
and the radio didn't come back on. took it to advance auto check the battery
and alternator. and it was the alternator because the battery lights came on i
began to lose power very fast until the car shout down had it towed.
Replaced the alternator and my radio still does come on black screen. and
also i have to used my key fob to started the car and now when i turn its like i
lose all power nothing works cant pop the trunk or lock my car.. but when the
car is running trunk work like great all everything electrically  work. please
help me and my genesis....