Not happy with vodacom

I am not happy with the latest issue I had with my vodacom contract. I called in the month of May 2022 and reported that my phone has been ****** and would like a new device and contract. The consultant assured me that the device will be delivered in a matter of days. I called again when I saw there was a delay and they said the delay was caused by the device not being available so they provided me with a new contract option and device and promised again that the devise will be delivered soon - I am still waiting even now, I recently called today and the cancellation/upgrades department are saying there is nothing the can do on their side as the account is now in arrears however I have been waiting for vodacom to deliver on the promise they have made.