"We have given the Ivorian federation notice to send the player Francois Zoko to Nancy and have asked Fifa to intervene, " the club said in a statement.
Both Zoko and Marshall had efforts cleared off the line before the latter took advantage of a sleeping Wednesday defence to flick Madine's pass over the on-rushing Nicky Weaver.
Zoko's well-placed headed goal warmed up the home fans in a scrappy first half, while a bad-looking injury to Wednesday striker Neil Mellor saw him carried off on a stretcher following an innocuous challenge with Michalik.