Don't think I can help you much but others here will. I think they will need more information first. If you didn't see your dog pee/poo he won't understand why you are upset and why he is put in his crate. Has he been checked out with the vet for a bladder infection? Is he taken outside right after he has eaten and after playing? Have you tried to crate him at night as he won't soil in his sleeping quarters?
Welcome to Pet talk !!