Poor service delivery and a bunch of criminals and scamster wit 30 years of experience

Keep in mind my Vehicle was running like a machine i just wanted to upgrade my Turbo and gain more power... Where do i start.... I decided to upgrade my Turbo on my Isuzu kb 300 after sending it to Stallion Turbo they upgraded the turbo and after installing it found that the turbo is not boosting i contact stallion and explaind and they said i must book in the vehicle after booking in the vehicle they came with different kind of stories for the turbo not boosting first they said i must Replace the intercooler and the air filter that wil fix the problem so costing me 6K for the parts after the 7k for turbo upgrad the said its fine but there is a vibration on the engine its the Injectors ... And it took them 3 days.. I fetched the vehicle just to find the turbo is still not boosting contact them again and explained that it still not boosting the said i must bring it back again took the Turbo in again and the said the will send it to Bloemfontein for testing on a machine... Don't really understand so how do the test Turbos if the dont have a machine but anyway after 3 days when i fetched the turbo the asked me WHO WORKED ON THE TURBO( i was stunned by the question becuase they worked on it) becuse the shaft were adjusted and one of the circlips were missing... Then the gave me the turbo and said its fine and if its still not boosting then i must do my injectors.. Installing turbo just to find still not boosting... Took it to another TURBO REPAIR COMPANY just to find the turbo was not ajusted correctly and the shaft were damaged and the adjustment were out by 8mm.... Now trying to get my mone back from Stallion the said i voided my warranty because my intercooler was leaking. PLEASE PLEASE STAY AWAY FROM THEM THEY ARE A BUNCH OF CRIMINALS WITH 30 YEARS EXPERIENCE..I am busy with legal action.