It might be that the advice given was logged against your call, if it was you should complain, if not then you don't have that much proof that you were "mis-sold" the software, either way as said above, you will need those CDs eventually. Especially if somewhere down the line you want to sell the PC.
Oooooh Homer.... obviously those copies would be for backup reasons only

We copy the CDs that go out with our notebooks as they are specific to those models and the damn ships never send them back if the pc develops a fault. PITA trying to re-load the O/s and drivers etc onto a system when you have to bodge the install.