Negligence

On the 19th March 2016 I went to the garage to fill up. I asked for my oil and water to be checked and my tyres.the guy who assisted me had attitude and accused me of talking back at him while I was talking to other people. To mu attention on the 8th of April 2016 on my way to work my card started over heating then I pulled over. When I opened my engine only to find out my oil lid is not there and the last time I filled up the oil was at emkhatsini sasol garage on the 19th of march. Now my car is damaged due to negligence. I'm facing problems now because of poor service. I now have to replace my engine and pay loads of money due to negative attitude. This has to be put on alert. I'm so dissapointed.