Sold me a faulty car and they are failing to repair it and they don’t want to take it back

I bought a car from them in January 08 2025 the car has since been with them due to a faulty engine exposed wires and broken fender liner the car is also missing a splash tray Bad treatment from Mohammed muller and Juan. I was promised also a spare key but now since I took the delivery of the car Mohammed muller and Juan said am on my own