I agree with Scarlet and setting aside a clam shell or an area in the yard where a sandpit can be made and encouraging the puppy to did in that area.
It is hard..... and very frustrating sometimes but trust me...... once they get out of that stage (and they will get out of it ), they bring so much joy and love to your life.
You do look back and say to yourself.... "How did I ever cope" but then those big brown eyes look up at you and you automatically know how you coped.
Just perservere and try and have an area where he can dig .. ... try hiding toys or a bone in there and show him that he's allowed to dig in that area. Always praise that and frown upon the other digging he may do so he knows the difference.
My Nelly is 3 and a half now and is so well behaved. Don't get me wrong, there are those phases she goes through and just has a dig here and there but there's no more pulling clothes off the line, no chewing shoes, no chewing wooden doors and fencing etc.
Just be stern and hopefully things will start to look up for you guys.
Kimmie