You've stated that you sent your drivers in for new diaphragms & a recharge of the magnets, right ?
So why would you expect a full rebuild ?
I think that you bought a pair of beaters ( in rough shape )
//> sent them into GPA for new diaphragms & recharging
//> the drivers came back as you described, and
only now do you give your beaters a critical look over ( & sadly discover the existing bug-screen issue ) .
Under circumstances like these, why would anybody want to fan the flames of moral outrage on your behalf?