Checking my new car order I notice the dealer has ordered High Gloss shadowline roof rails instead of the Matt Aluminium

I had emailed the dealer with my build day before order was placed and when went in the following day he printed it of and checked it the I signed the new car order. So was checking it today as I had nowt else to do & noticed the mistake.
Telephoned the Sales Mgr who after checking confirmed the error, & admits mistake is there's.
He said they will replace shadowline with Matt aluminium, he says they just clip onto a roof rail template. However I'm not so sure, I think they bolt on through roof metal & roof lining will need taken down to access bolts etc, which I am definatley not happy with


If its just a clip on issue to a template (template thats bolted to roof)fair enough, but if the whole roof rail is fixed by bolts I am not happy spending £54k to have roof linings removed...........
I have called a couple different BMW part dept and have got conflicting details, some say the roof rails are @£200 a side with 3 bolts each, another said it looks like they clip on and are @£80each with 6 or so clips each

What do you guys think?