I need help with my 1996 Nissan maxima

Ok my car needed an alternator it was over charging my batery. I put it in the shop to have if done. Today I called to see if if was done. He tells me he put a brand new one in but for some reason it’s not charging at all now. He says he’s troubleshooting. Is it jst the new alternators junk or Is something else wrong? Am I in trouble?

It’s possible to get a faulty alternator. Even a new one. A few quick tests should determine whether or not this is the case.

Thnx he did that and it was junk so I got another one. Pain in the ass really