I believe I have been buying wrong stuff and missing the real problem on my car YCP 443 GP

I have requested job card where Toyota Welkom have printed for me and shows that since I have paid almost more than R 20K for my car to get fixed to be more like normal as they are the one diagnosing the car since August but to date my car still have the same problem I brought with the.

It is embarrassing that out of all things they have diagnosed they fail to fix the real problem which I think it has been the problem from start as I bought the wrong stock due to wrong diagnoses.