Stay away from VODACOM contracts

So I upgraded online in September 2021, upon receiving my phone via delivery I decided I no longer want the phone and want to cancel the contract so I called Vodacom to pick up the phone again. They took almost a month to do this, their terms and conditions state that the customer has 7 days to change their mind which I was well within and they will collect it within 5 days. They took a month which was in mid October, they collected the phone and according to the tracking and their information they received the phone from the courier company on the 23rd or 24th October 2021. Since then I have been trying to get this contract cancelled which I'm paying for every month. Vodacom's reason for this is that the phone wasn't purchased from the Vodacom warehouse and they must investigate where it was purchased from, they then tried to send the phone back to me and said once I get it they will assist me further but before this they couldn't find the phone again because it disappeared between the courier company and their warehouse and this literally took 2 months. I refused to take receipt of the phone and said it is not my problem where the phone was purchased from as I did the upgrade on the Vodacom website so where they purchase it is not my problem. I have been reaching out on Facebook and calling them more than 3 times a week but still no one can answer me why this can't be cancelled. Vodacom is officially the worst I've ever experienced when it come to service. I WILL NEVER RECOMMEND THEM TO ANYONE BECAUSE INCOMPETENCE IS WHAT THEY EXCEED AT.