R450 Car diagnostic turned to a 15K spend and car that does not drive or start.

Taking a car to this establishment for diagnostics proved an expensive and dreadful experience for me. I requested a R450 machine diagnostics to be done on my car. No output of this was given except that the car needed further engen strip diagnostics which cost R2400. After an engen strip diagnostic, I was informed that I need 22-34K for manifold replacement or tow the striped car and its pieces. As my financial situation does not allow, I negotiated to source a manifold. I spent R10K on the part just so my car can be reassembled so I drive it home. The engen was reassembled with new manifold and the car was not driving due to dead injectors with a quotation of R60K for engen overhaul. The car was driven by me to premises as faulty as it was driving, but the car left premises in a tow truck. I owed the establishment labour of R2700 to put the manifold as the diagnostics charges were to fall away if I fix the car. I ended up paying R5400 for both the machine and engen strip diagnostics. The reason I was given is because I was allowed to source a manifold myself. The car is no longer starting, it’s not driving R15K later. All I took the car there for was a diagnostic so I understand the problems of the car; and which point the car was driving but was vibrating.