Vodacom refusal to end contract

On 20 June 2020 we phoned Vodacom to have a cellphone contract cancelled. They cancelled it and it will be discontinued end of July. End of July it was not cancelled. 1 August we phoned again, and the consultant consulted their supervisor, and said the contract will be cancelled within the next hour. It is now 36 hours later, and the contract is still not cancelled.