AUDI UMHLANGA

I have never seen such bad service in my life, I sent my car to service on the 4th of November and on the 26th of November the car broke the block. The oil filter was not changed engine oil was not changed, the plugs were also not changed the only thing tjey did was to wash the car. I am very disappointed and I now have spent thousands trying to fix the car yet I paid for a service. I want to be refunded there was no service done there. I then spokebto the mananger and informed him that they were the ones whobtold me there is a 1 month warranty however he said they cannot help me, how come what happened to the warranty? I am so angry and very frustrated, I want my money back.