Vodacom not wanting to take their sales back

Vodacom online contract are ******. I bought two phone online, of which one was by mistake. Now as their policy says I have 14days to return I called in to do just that since I can't afford both phones. On the the 10th December 2019 I called to cancel the lady who helped confirmed it has been canceled as per my request and RAM the courier company will come collect. On the 11th December 2019 I had no sms or email confirming that RAM is coming to collect. So on the 12th December 2019 I called and the lady that helped told me she doesn't see any cancelation. We again did another cancelation. My concern is that the 14 day period will come to end and will be forced by law to pay both phones for two years. Of which I cannot afford. Can I please can help with this matter. It is not fare that vodacom when buying they quickly help but cancelation they drag or do nothing. I cannot afford both phones. Vodacom please assist call me.