replace a stub shaft and cv half shaft

This brand store located in Lubbock must be full of funny mechanics. They worked on my 2004 jeep liberty, and here is the story... it might be disturbing but it is true. Beware as you visit them. On or around July first 2015 my mother took her jeep there for repair following a diagnosis based on her perception. I advised her to take the truck to Midas, the muffler shop! At Midas the problem was diagnosed as a poorly installed Cv half shaft. First agreement put back the CV axle properly cost was 185. Second attempt we cant install CV axle because it is stack with stub shaft! my Mother took this together to another shop where the separation was done at 20 dollar cost. Back to Midas a new CV half shaft and stub shaft was installed according to Midas employees! I doubt this ever happened, Cost 622 dollars four hundred eighty more that previously agreed. Poor lady gets in truck drives home the same Nose persists, she return the Jeep! Now they have no clue where to start after two weeks My mother contacts Midas who claims the rear differential is bad and a replacement for 1200 is in order. These minions have no clue what their job is. They are a muffler shop not full mechanic shop.