Oh my God YLL, I thought you were talking about a puppy LOL. That's too funny.

Okay lets start from scratch.

Since this is a KITTEN, have you tried confining him in a room when you are out, spraying him with water when you catch him chewing?
When he starts to bite the ankles, push him away and give him a very firm NO and then give him one of his toys.
I've had a few chewing problems with my kitties but not to that extent. Poor you. I have also used an old oven mitt with my kitties and it worked like a charm. Got them all pumped up and then slept for hours.

Again, YLL, good luck with Sammy, the KITTEN.