.......just an afterthought on your unhappy experience. It's pretty obvious whoever did this
for you did not know Jack **** (I, OTOH, have a t-shirt attesting to the fact that I do know Jack.)

So it is remotely possible that the roughness in your headset is due to the bearings and their cages
being incorrectly intstalled (upside down, etc.)......probably won't help much at this point, but FWIW.