Worst Online Sales Service Ever

I app**** for a contract online on 07 Novemeber 2020, I immediately got an approval SMS and on 08 November 2020 I got an SMS saying that my order is waiting confirmation.

On 10 November I called the online sales customer care to check my order status and why I had not received a call from Vodacom to confirm my order and she told me that they had tried to contact me on 09 November 2020 but my phone was busy. I found that a bit odd because I did not receive an SMS notifying me of a call I missed or a missed called notification on my phone but the lady said they will try again.

On 11 November 2020 I called the call centre again and was told the same story and was told to be patient, I will receive a call.

On 13 November 2020 I called the call centre again and I was told that my order had been cancelled because the confirmation department had tried to call me 4 times but my phone was busy and that I could not order the same phone again because they only had limited stock.

When I requested phone records to prove that they had attempted to contact me, I was given the following email address *** which I sent an email to on 13 November 2020. I only got an email confirming that my email was received and I have not received a response yet.

How is it possible that the confirmation department called me but there is no record of me missing a call from them?