Louis Vuitton will replace parts such as handles at a cost. However, due to extensive wear to the canvas on the corners of your bag they will not be able help you. They will not repair / replace parts of items with cracked / ripped / torn canvas.
While LV won't fix it, if you want to continue to use the bag you might be able to bring it to a cobbler.
I had a very well used Hampstead brought in with the corners very bad and they fixed them quite well.