Hang in there! We have had our 10 week old for 5 days, he now understands we aren't excited when he pees in the house. But when he goes outside or on the pad he gets great treats! It takes some time, but it will happen! They are very intelligent! We also have LOTS of carpet treatment ready at all times :)
Yesterday we picked up our (almost) 10 week old Basenji named Kenji! He is a Meisterhaus puppy! :) We couldn't be more proud! He is sweet, affectionate, and so, so intelligent. We had a long night as expected, but today he and I have spent the day together on the leash and learning his name. He's getting so comfortable! He has even gone potty outside twice! Otherwise he is using puppy pads in our restroom. We are so happy! :)
I hear "yelping" makes Basenji's more excited. I have had success in the past (not Basenji) offering a toy when they do that and giving a treat if they accept it. --I am sure the Basenji vets on here will have some answers for you! Hang in there! They grow out of it!