POOR SERVICE AT GWM VEREENIGING

I had my GWM double cab Steed 2.2 serviced at the GWM Vereeniging next to Suzuki at first I told them what was wrong they didn't even know if my car was bought on a service plan I had to fetch the documentation, I told them to look at the left upper hand rubber on the window as it came loose, the aircon as it was making noises and a few other things that I understand wasn't they're fault at 3PM they phoned the car is ready when I got there I spoke to Amanda she said a claim must be put in to GWM FOR THE RUBBER AND THE AIRCON MOTOR AS IT WAS MAKING A NOISE IT WASN'T FIXED, THE CAR WAS SERVICED BUT IT WASN'T CLEANED INSIDE OR WASHED OUTSIDE THE PARTS THE REMOVED DURING THE SERVICE WASN'T INSIDE THE CAR SO HOW DO I KNOW IT WAS SERVICED IN THE FIRST PLACE.