Unable to Upgrade

Terrible experience currently with Vodacom. I've been trying for MONTHS to upgrade but no one seems to help or even bother to help. In June 2021 I received a call to upgrade my contract telephonically. Devices were delivered but I have returned them same day as the model were older than I currently had. Since June 2021 I've been trying to reverse the upgrade transaction. My contract now shows I'm only due for upgrade June 2023 and no one seems to be able to change this. I have been Vodacom shops 4 times, phoned the call center several times, 5 emails sent to Vodacom customer care. The last Vodacom shop told me to leave a review on Hello Peter...This is how pathetic the service is. Vodacom is not even interested in Sales. I'm spending close to R1000 per month on additional airtime because I am not on the correct package but can't get this changed. I am considering going back to my old network where staff are more eager to assist with sales.