My husband signed an agreement on 09/10/23 over cellphone conversation with Athenkosi Sithole and reported to me as his wife what has happened

My husband signed an agreement on 09/10/23 over cellphone conversation with Athenkosi Sithole and reported to me as his wife what has happened. I told him the terms and conditions of what he has agreed on and advised him to cancel the agreement today on 10/10/2023 but instead of that Athenkisi referred her to Sibongile and I don't understand because it is not even 7 days after the agreement has been made.. I need your assistance in this regard.