Don't give up on them, they will come round, they love being handled, just pick them up slowly and hold them loosely and keep stoking them, always keep them away from your face though. once they trust you to be gentle with them they will run too you to pick them up. Try lying on the floor with them and stroke them all the time, just remember to be careful of your face, if one latches on your lip in your in trouble.
Should one ever gets its teeth into you, (happened to me once, my fault) it may not want to let go immediately, never let the ferret dangle or it will bite harder to prevent itself from falling, rest the ferret on the floor and be quite, it should then let go.