Worst second hand car experience ever

My husband and I traded in almost 2 brand new cars in December 2024 and got sold 2 dud cars. My husband had to eventually give his car back to stop the back and forth of endless **** and poor workmanship from the mechanics they use. My car is still almost a year later still going in for constant repairs. Steve offered to swop out my car but now that it’s costing so much money to fix he has gone back on his word. His own staff members admitted to my car been sent back to me with problem's still. The mechanics have sent my car back to me with my engine cover broken and parts lose in the engine, another time they sent my car back to me with a Broken pipe in the boot and said nothing aswell