my puppy (LAB) had the same issue till she was 8MONTHS, chewing furniture, remotes, biting so hard tht it would draw blood. My arms and legs had these marks tht people would ask me if i was being assaulted at home... :P SHE WOULD LITERALLY PUNCTURE MY FLESH.
Try to say no...i would punish my puppy for five to ten minutes by putting a muzzle on , the one which is made of nylon and open in the front so that the can stick out their tongues and pant.
Make sure that you don't beat them or be aggressive as they become more stubborn , also the muzzle shouldn't be too tight .
link to the muzzle