Don't give up.....Livie is still a baby girl. When Bella was a pup & I thought she had it down, I let her have roam of the house while playing, etc. That's when the accidents happened, so I would start the process over of confining her to one area. She would get excited about playing or roaming around. When the accidents happened, I would say "no", pick her up, & taker her to her pad. Remember, if an accident happens, you need a good product to rid the smell or they will go there again, they don't know any better.

I bought a product from my Vet & it is Great!
The Equalizer carpet stain & odor eliminator. You can find online too.
She finally got it & now we travel & she uses her pad with no problems.