
Bin the training pads.
Effectively, what yu have done is trained the pup to think its fine to toilet indoors when you arent there.
What you really need to be teaching him, is that toileting outside is VERY rewarding (ie you stand there adn throw a flipping party when he does, hand out treats etc), and that he does sometimes have to WAIT to go outside.
Defnately get him a crate, and NOT one big enough for him to poo in one end and lie down in another. Teach him that this is a nice quiet place to go lay down, give him treats in there etc, its a LOVELY place to be, not a punishment of any kind.
Hopefully he wont want to poo in his den, and you can gradually get him used to sleeping in there when yu are out.
Em