The agent of Wilfried Bony has admitted to frustration at Vitesse Arnhem's haggling tactics over the price of his client.
Francis Kacou said that a deal of £12m was agreed with Swansea City six months ago, but the Dutch side are now trying to squeeze more money out of the Premier League side.
"Why does it take so long? Six months ago, we made arrangements for a lump sum of £12m, regardless of goals," Kacou said to Voetbal International.
"Swansea wanted to pay and Bony has seen that, but Vitesse wanted more. Now there is an offer of £14m plus £2m in bonuses. Why is Bony still in Arnhem? We do not know what they want.
"West Ham United, Everton and Liverpool have been reported as having an interest, but Swansea has made the best offer. I want clarity, and a promise is a promise."
Bony said last week that he was hoping to conclude the transfer soon.
