I think if you let the hair grow on the ears it won't matter much to you how they turn out. He'll still be cute in your eyes :)
He was awfully young to leave his mother but it sounds like a good thing he is not still there. If there were other pups you might want to report this to any local humane enforcement groups near you.
If it was a straight line cut it could be from someone trying to crop them and doing a bad job.
You need a skilled person to do ear cropping properly and preferably one licensed to do proper anaesthesia.
If you want the ears to stand and match you might ask your vet for a referral to a vet who does this surgery and does it right to see if they can be salvaged at all.
If you want to try and help them stand without doing anything to the skin or covering the ear opening you can (if there is fur left on the ears) glue the ears back to back by the hair on them only to help them support each other. Fabric glue is commonly used for this. Jiffy Sew is one product used for this.
Or you can check here for a taping procedure
http://glassyorkies.homestead.com/care.html#anchor_13112
But you could only do that after infections are cleared up.
Hope this helps you!
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