Swapping has worked for me. I have been using this technique since Athena was a puppy. Now, when she has something she knows she should not ( like other day she found a golf ball in the garage) she drops it when I use my big-BOOM voice now. But, this was over the course of a year and our interaction together.
Put dog on NILF and make sure you are 'TOP DOG', I would not accept a growl. Grumbles- yes ( dog play behavior, look to other body language indicators like pose, etc. ) , growls - no.
Be careful of negative reinforcement too. Chase a dog for an item, wow - great game for the dog! This will impair your ability to call back a dog - they like to be chased!
Out think them, the kitchen is your friend. Open a closet, make noise with food package, make yummie noises, dog will investigate - make dog come to you ( not begging in this instance, that's not tolerated by me.) then, get dog treat or toy and do swap out.
This breed is smart! My girl keeps me on my toes! Not 'boring' like other dogs I've owned in the past!
Also, I'd remove the paper towels from the area so dog cannot get it. Since getting my male rott a few months back, Athena has taken to eatting cardboard , etc. rather than leave it on floor, to prevent other dog from getting it. So, no more toilet rolls after they're empty
Best of luck! :)