They just ripped me off for over $2000 on repairs ...

They just ripped me off for over $2000 on repairs top my 2017 Duramax! Truck has stranded me on highway 3 times since 9/18/19 of this year with 74472 miles. Towed to Trenary in Union first time with code P018B. Trenary said air was trapped in system. Cleared codes and reinstalled old fuel filter and returned truck to me no charge on 10/4/19( I did pay $281 for a bad w/s washer pump). Second breakdown occurs on 10/26/19 at 75882 miles. This time towed to Butler Chevy. They have same code P018B. I'm told my low pressure fuel pump in the tank is bad and is excluded under Chevys powertrain warranty. I was told it would be around $1150 to repair. I gave them the ok. It took them until 11/26/19 to fix my truck. Almost a month. They want me to pay $480 for a rental car I had for 2 weeks plus the repair for $1230. I did. I then post on social media and the owner of Jim Butler decides to refund the rental car to save a little face.... Finally, good on them. Unfortunately the truck breaks down again the exact same way it had the other 2 times on 12/14/19 at 76805 miles. Towed back to Butler. Guess what? Same code P018B. The service advisor tells me it's the module and he's going to replace it. Calls me back next day and asks me to come in and see something. I get there and he shows me debris in my fuel tank and proceeds to tell me that I have to pay for this because someone has put this debris in my tank if it wasn't me. I ask him if it's more feasible that the mechanic accidentally got debris in my tank during the time he had my tank out for repairs and completely open sitting on their shop floor for weeks waiting on my pump? He says "I know that didn't happen". So, in the end I've paid over $2000 for a 2 year old truck still under powertrain warranty. Bill the service manager is a rude, unhelpful, lazy, and most of all dishonest. The one time he calls me back during month plus they had my truck he tells me to pay for the repair or I can come get my truck as it sits and he wants his loaner back today. Then once confronted he's even worse in person. Bottom line is from the owner, to management, and on down Jim Butler Chevy is joke!