2006 Dodge Charger Q&A

2006 Dodge Charger Question: Replaced alternator and battery and car runs poorly

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