It is caused by differences in clutch finger heights. A common problem.
One finger hits one may drags and so forth. You could adjust your clutch free play it will stop your noise but your bearing will be spinning all the time.
So really you need to Hit the bloke who sold it or fitted it for you up for parts warranty.
The marks will now be in your pressure plate fingers. And nothing will fix it except replacing the pressure plate. And through out bearing.