Bad service

I am disgusted with the service I received at Hyundai Plumstead, and this is not the first time. <br> 1. They claimed to have fixed my seat (foam collapsed and bar sticking me in the back). When I got the car back, there was no improvement. I had to inconvenience myself once again and take the car back to have the seat \replaced"with another demo models seat (also not to my satisfaction).<br> 2. The service manager tells me to bring the car in to him at a certain time"