Incorrect contract dates & failure to rectify after 24 months

I signed up for a pre-order for iPhone 13 in October 2021 on a 36 month contract. There was an error made on the quotation and the contract was made for 48 months instead of 36 months. Due to this, the expiry date now reflects as 2025 instead of 2024. I have called Vodacom atleast once a month since then to rectify this and I have never received any responses on the escalation.

Upon calling again I am always told that there is no escalation in place and I am put through various departments once again. The latest escalation reference is ***. Kindly note that I have waited 24 month for Vodacom to rectify this. If this is not rectified by the end of this week, I will be escalating it with the ombudsman as Vodacom is making no effort to rectify the error on their side.