
This may sound harsh, but what are
you doing while your puppy is causing this damage? Watching him, as you should be? Or leaving him alone with all these valuable (to you) toys? If you don't want him chewing your shoes, make sure they are secure in the wardrobe. If you don't want him chewing your suite, make sure he isn't unattended in the sitting room.
He won't train himself - that's your job. If you're not up to it, take him back to his breeder as soon as possible. But don't expect a full refund. Would
you buy a 4-month old puppy rather than a 2-month one?