i bought 2 amex with 3 digits cvv2 code, and i send him a ticket in support section i got reply after 2 days, with
use 0 with cvv example: 01234
this is the most rediculous reply i have seen from support.
the cards are simply invalid in format and you should replace them, if you do not want to replace , you just write in your shop that you can not replace them.
For me money no problme.
thanks.
mcvisa