Workshop pulled me over the table….

Hello, can anyone give me information? my car (SangYong) didn’t turn on properly anymore, and also lost Oel. The car was several times in the repair.. The 3rd time claimed the Mech. (Chef) The machine/gear was defective. However, since I was a bit suspicious and in this forum someone had found me hoping that this was definitely only the board. So I just read the board change. The Mech. was very bad and claimed I would not come home with the a car ( 20Km). But I had made it! A forum member advised me to have the transmission oil checked urgently, because the car was powerless. The measuring rod showed no oil!!!! a Mercedes garage had then filled me 4l gear oil…….. The garage owner from Eschlikon had tried to break the car down to home.(gear damage) In Steinen I then found a very competent garage which had confirmed to me that the machine was not defective, and The Garagist had built in the wrong candles that were too weak (some of which were partly plastered) and which had to be drilled out very elaborately. The whole thing then cost a few thousand francs. I tried to find a solution with Urs H… and asked him to take over half the bill…. Without reaction, he denies the candles! But did a bill where the candles are charged. Do I have to accept this? Should I operate it? Does anyone have experience with a similar case? Thank you very much