Lenovo — Regarding my default laptop

I had purchased the laptop last year in august and it's not even 1 year and my laptop is facing lots of problems. First issue was with the camera that the camera is not running properly and after complaining so many times the support team had sent a person to change the camera and soon after changing the camera the left side of the screen had a black spot in it and the camera quality was so bad, a blur image was coming. Actually by these issues the company is ruining its brand name and it's really disappointing. And the support team is not even telling me the issue that my laptop is facing.
After these problems I really want my laptop to be changed by the company because I can not take this anymore. And after this i can't trust this laptop anymore, i really want the company to resolve this issue ASAP and what will be the guarantee that my laptop will run smoothly without any problem.