Renault Captur 1.3 EDC TCE 140 Hp Makes A Rattling Sound When Driving Over Bumps

In my Renault Captur 1.3 EDC tce 140 hp vehicle, every time I drive over or encounter an obstacle, there is a sound like metal stress from the rear (fence, snap, snap), when I went to the authorized service related to this, I was told that the roof tile of the vehicle would be removed and the insulation procedures would be carried out, and it was said that I received the vehicle for the first 10 minutes, there was no sound, but the same sound intensity continues to come in a low way again. I complained that a vehicle at 18000 makes noise in this way without comfort. My vehicle arrived at 23000 km and the sound continues violently. I called Renault and said that the process didn't work and I was redirected to service. The response I received from the service was even more shocking. They said that the chassis of the vehicle did not sit, it would sit in time. Although it was written to my file on this subject, I did not get a return. At this point, the brand cannot produce solutions in any way, I started to think that my vehicle was defective