Ports of Auckland management have been accused of refusing to meet its striking workers and attempting to discredit them with a misinformation campaign.
Business worth $100,000 a week to the port is set to end up at Tauranga and Napier after Fonterra said it would move shipments away from Auckland.
The dairy giant said months of industrial action were behind its decision.
Maritime Union president Garry Parsloe blamed the ongoing disruption on managers, who he accused of offering "cut and paste" employment deals.
"The quantity of the offers is not the point. The quality and the genuine nature of the negotiations are what matter. One hundred offers are pointless if they are one hundred offers of rubbish."