Now send it back to them with a video!
Be sure to pack a stool sample in the box too...
That's what I would do along with all the e-mails back in forth, also mention testing it on numerous computers again.
i5-2500k @ 3.3, Asus P8Z77-V LE mobo Windows 7 64-bit, 8GB 1866mhz
EVGA GTX 670 FTW 2GB, 8800GT 512MB, 256GB SSD, 500GB WD, CH Franken-Potato (Stick, Throttle and Pedals)
TM Cougar MFD's, TrackIR 5, G15 keyboard