How badly? Have you got a local record store that does flattening? If so, see how much it is and get VMP to reimburse you the amount + like $5 or something! I do that now with everywhere I buy vinyl from as CS is usually happy to adjust in some way!
if the vinyl is extremely severely warped; like if you saw the discs in my Madvillainy video, then I would ask for a refund. Otherwise, I just get it flattened and ask for a partial refund. That way, my local benefits from me spending money for their service + it saves a copy!