Replaced alternator and battery and car runs poorly on 2006 Dodge Charger

When I picked my car up from the shop lights were in such as brake light and others. So I drove home and noticed it wouldn't pick up speed and the speedometer wasn't working at all neither was the radio what could be the problem now.

1 answer
SOUNDS LIKE THEY DIDN'T DISCONNECT PWR WHEN REPL ALT AND SHORTED OUT SOMETHING.RETURN FOR WARRANTY