Silverlakes branch - charged me Allot of money for a non runner!

I bought a car on auction 29-Nov-2021. The dekra report disclosed that the car has a misfire and 2 headlights are loose. They never told me the car was a “Non-Runner” It has been 4 weeks and the car still doesnt start. I have paid mechanics over 7000 but still the car wont start. They should've charged cheaper for the non Runner. This is really so unfair towards me. The service is really bad! I actually just wasted my money. I got a new quote today to buy a new starter will cost me 4300 but labor of 2500. They should've disclosed this information so i could have made an informed decision when purchasing this car. Now im stuck with a car that doesnt even start and I already paid 7000 to mechanics. So its a No Win situation for me. No one will help me with all this problems. I lodged multiple complaints but no feedback from we buys cars.it is really unfair what they do their customers.!