Aw.
It can take a while to erase a fear once it's been implanted. Maybe you can think of this as a "patience growing" opportunity.
Have you tried bribing him? Give him some really nice treats. Don't force him to eat them out of your hand. Lie on the floor and toss one, again, a few feet away from you and a few feet away from him. Let him eat it. Gradually put the treats closer and closer to you. If he seems to hesitate at a certain point, don't push him. It helps if he makes the decision to approach you.
Also, I might stop all corrections for now. Yes, you may have to deal with a little monster a few months from now, but you two will have a developed a bond that can be the basis for loving corrections. If you haven't read anything by Karen Pryor, go ahead and google her name. Many trainers believe in ONLY using positive reinforcement. So if you do well, maybe the two of you will bond AND he'll learn to behave.
Finally - is there a park or another area you can take him to? Often dogs behave differently in different areas.
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Finally finally: I think it's fine to "all but ignore him" for the moment so that he can find his way back to you. Feed him, entertain him, speak to him softly, and let him come to you when he's ready.