he probably couldnt be bothered to change it for you!! but it has been said that the refurbed boxes are proving more reliable than the samsungs,but considering a batch of over 50,000 sammys had faulty power units its not suprising is it?
personally i wouldnt have a pace box as they are SOOO SLOW,i'll take my chances with the sammy thanks

if you did have a visit for a fault and required a box swap the tech can only swap it for the make of box he has on his van which will be predominantly sammys.
if its a legit box stuck on pace it will require a swap-out.