How old is your dog? And what breed? Some breeds are harder to train than others.
Perhaps crate training your dog would be better. When used correctly, a crate could be a dog's safe haven. There are plenty of info online regarding crate training, google ba.
Puppies chew, that's what they do, accept it. If you want to teach your dog to not chew, you need to CONSISTENTLY discipline him, NO EXCEPTIONS! Make a weird sound to attract his attention, tell him "no chewing" using a low-authoritative voice but no yelling or screaming, then give him a chew toy, and when he does chew his chew toy, give him a lot of praise like "good chewing <<dog's name>>, good chewing!"
Paper training takes time too. You can get a spray that simulates other dogs' urine smell, so when your dog smells that, he'll pee naturally on that spot. I use it to train my little Diego, it does work 90% of the time (he's only 7 weeks old), but I still need to watch him closely as he is too young to be completely trusted. Make sure to give him A LOT OF praises when he does pee on the right spot, make a BIG DEAL, using a high-pitched voice. That being said, taking the dog outside to pee and poop is still preferred over paper training. After only one week of active training, my little Diego now wiggles his little tail in front of my patio door when he wants to go out to pee or to poop.
Good luck!
