"Why does it take so long? Six months ago, we made arrangements for a lump sum of 12 million, regardless of goals," Kacou told Voetbal International.
"Swansea wanted to pay and Bony has seen that, but Vitesse wanted more. Now there is an offer of 14 million plus two million in bonuses.
"Why is Bony still in Arnhem? We do not know what they want.
Kacou says he will not be starting the season at the Gelredome.
"One thing is for sure, he will not be playing for Vitesse this season," he said.