丧失的东西,没收的物品因犯罪、犯法、犯错或违约而丧失或被没收的物品 Something surrendered or subject to surrender as punishment for a crime, an offense, an error, or a breach of contract.
很明显此事属违约行为,望你方准备采取必要的行动。 Case refer constitutes breach of contract beyond dispute necessary step request your side.