Hiring a Sales Team can be extremely difficult and frustrating.  Here are some suggestions based on 100's of interviews and folks we've hired over the years.

How to handle objections - are they really objections or complaints?

We disect 10 Steps to success by Lou Holtz in his book "Winning Every Day"

Getting to a potential customer's needs all comes from doing a Deep Dive or a Discovery.  You can't provide answers when you don't know what the problems are.  FIND out what those are.  Asking questions and using ducktape.  Listening is the key skill to learn here.