Car services/customer service gone wrong

On the 14 April 2021 i took my car for 150 000 km service, 2 and a half weeks down the line after the service i started to experience some problems. At first i could hear that on the stip heels the performance is not like before but i thought that i was my imagination. The next thing the car started to not start immediately and i tjought it was a battery and we changed the battery but the it did the same thing agsin so i toik it in back to tiyota edenvale and i spoke to Deeshney who was responsible for the service bookings who called Mack Morata apparently he is a foreman who diagnosed the car and find out there was no electrical fault and i went back home, agaun a day after the car did the same thing, it couldn't start it keep on making that sound as if its gonna start but it didn't and i went back to Toyota edenvale again i didn't get help all whst Mack said i should bring the car to sleep over at Toyota so that they can start it first thing in the morning whuch to me is abnormal why the they think is the morning when Mack Morata or Deeshney did not even bother ask the specific time of the car not starting they just assumed it all happened in the morning. So u decided to get a second opinion because i could see that th8s people they are running away ti take the responsibility since the car came in for service and after 2 & 1/2 week im experiencing this problems. The second opinion diagnosis also find that electrically there is nothing wrong but since he cannot touch the engine due to warranty policies he just assumed that since the orange light on the dashboard stays on for a little bit longer time than normal, the problem might be in the engine and he suspect that there might be a Leaking oil from the tapped cover in cylinder to spark plug thus affect the performance of the car on the stip heel.. On Friday 10 i call Toyota warranty and told them about my tgis issues and i said i wanted the car to be opened and check they saod i should should contact Toyota edenvale and i did and i got the sms the car is booked for 7:30 am on the 10th..Today i took the car in Mack said there is nothing wrong with the car abd he also called his boss t9 test drive the car whi said there was nothing wrong witg the car but both couldn't give me the answer to why it did not start immediately not once but 3 times and they said the could not touch it. What i want to know to toyota McCarthy genuine why am i paying Mechanical Warranty if my car wont be look after when experiencing problems