Mitchell Lippman

Bought new 2014 Audi A6 TDI diesel January 2014. Has been always serviced according to Audi recommendations. December 2021 the fuel pump failed and took a month to arrive from Germany. Three months after fix check light and glo plug light came on. I continued to drive slowly and car stopped altogether. Car was towed back to repair shop and was told problem was a loose connection. In Chattanooga September 3, 2022 and lights came on again so towed it to the only Audi dealer in town. Service department closed for Labor Day holiday and sales people there said to leave car and keys with filled out information form and service will look at it Tuesday September 6. Since I live in Atlanta had to rent a car and come home and wait for call from Chattanooga Audi Would like to know if problem with car could be due to repair shop installing fuel pump did it improperly or damaged car in process Any help would be appreciated Mitchell Lippman