Alex Hayes, the vice-president of the French club, claimed the Black Cats tried to change the terms of the deal after the defender had travelled to England to finalise the move
Lorient vice-president Alex Hayes has described Sunderland's conduct as "scandalous" after Lamine Kone's move to the Stadium of Light collapsed.
Sunderland boss Sam Allardyce confirmed on Thursday the club would not be pursuing a deal for the Ivory Coast international after he had traveled to England to discuss personal terms and undergo a medical.
Allardyce said on Thursday: "The Kone deal has broken down.