Vodacom is robbing it's customers

I had a contract with vodacom which ended December 2023 I called in to cancel the contact. They said I must wait for confirmation. Never got it. January I visited the the vodacom store to cancel again.. Short after that I received the massage saying my account is in arrears. What I will like to know what areas when I canceled the contract. When ever you call in your calls are not answered.