Faulty laptop precision 7680 since purchased

Dell Order No : <Private data removed from public view. DELL-Admin>

I have purchased a Dell precision 7680 top spec.

Since received I have noticed that is not running flawless as it should but instead it is freezing and lagging constantly when doing basic operations such us writing emails or navigating the web browser….. also all kind of silly errors as not being able to open none of the applications , when clicking on icons not responding. 

this is not something that is expected from this machine .

Dell reference:<Private data removed from public view. DELL-Admin>, for the Service Tag: <Private data removed from public view. DELL-Admin>.

following my conversations with Dell help team which I have contacted since day one and wasted a lot of time in trying to resolve the issue, the latest “fix was to reinstall the windows which I did but nothing changed .

long story short now I am told that I need to send it for repairs and it will be fixed with refurbished parts which I disagree with, I purchased a brand new expensive laptop and it had issues since day one , now why am I getting fixed with second hand parts ? This is not acceptable at all