Puppy`s cannot unlock cupboards or reach up more than a few feet in height, and to say you have tried EVERYTHING to stop this pup chewing on shoes is just NOT the case.
Also the pup legally belongs to your parents as you are under age to be able to OWN a dog. So, what do they say about the shoe chewing?
6 dogs by the age of 14!!! 😮!!! Pull the other leg.
Most of them should still be alive now, so where are they? Still in your house?
The only way to stop a puppy chewing on unwanted items is to make them inaccessible to it, which is easily done, and provide the pup with his own toy box containing a selection of interesting things /toys for it to chew on, and to distract the pup to the toy box, if it tries to chew on anything else but what is in the toy box.
They soon learn to just chew or play with things from the box, and leave any other stuff alone.
GSD owner for 56 years. (UK)