Horrible horrible experience

Bought a Chery Tiggo 4 pro cash from this dealership on 30th May 2025. On 2nd June I discovered a rattling noise when driving, informed them and had to book the car in to the workshop. It was discovered that the brake pads were worn out. It got replaced but the noise never went away,which I brought to their attention again,and again had to take the car in, only to find that the actual is from the exhaust pipe and catalytic converter that is broken. They figure it has been tampered with,and indirectly implying that it happened AFTER I took ownership of the vehicle,eventhough I informed them 2days after about rattling sounds I'm hearing. Mind you, I've asked the salesman when I will get to test drive the car, and his response was "who still do test drives"! Also, why did the roadworthy pick up the worn out brakes? The driver's seat had a big tear in it,and the rear end of the car had scratches that were repaired before I collected the car,but the 114 point check didn't indicate any of those issues. How do these dealership ppl sleep at night,knowing what they do to people and their hard earned money?