Not looking into you eyes, means that you are the boss...For animals eye contact with a leader, means that you are challenging the leader. So that's actually a good sign.... :blob4:
But...about the behavior....Patience, love and more patience. My first ferret bit me until I bled, and I really thought he hated me. It took me 2 months to make him accept me and trust me...And trust is a key word here...The ferret biting you and don't want to be held, is a sign that they are insecure and scared.
I would do it lik this:
When the ferret bites:
Take the ferret and hold him in his neck...squeeze him gently down at the floor, and hold him there for a few seconds. Ignore him afterwards for about 1 min. Do this EVERYTIME he bites, or you will give him mixed signals, like that sometimes biting is okay.
When the ferret don't want's to be held:
Some ferrets just hate being held, but try to keep him calm for a few seconds at the time...Forcing him to stay longer just makes the ferret stressed.
While you hold him, give him a treat...After a while he will connect you hodling him as a good thing.
To make the ferret trust you:
Don't push the ferret. Make some noises everytime you are about to give him a treat. Let him come to you...It won't take long before he comes running everytime you make that special noise
Sit down a talk softly to him...let him get to know you voice and smell...Such things are important for a ferret, since they don't see very good....