Vodacom airtime purchased but not credited

I purchase airtime on the Vodacom website on a regular basis for the intercom of the residential complex that I live. On 21 December 2020, I purchased R500 airtime on the Vodacom website but the number was never credited with the airtime despite the R500 being deducted by Vodacom from my credit card. In fact, that day and ever since then, there have been error messages on the Vodacom website when I use it including when I click on the order history.

I have called customer care for assistance and had lengthy written conversations on Facebook Messenger (which I'm happy to provide) including submitting the proof of payment and my credit card statement but have had absolutely no constructive assistance to resolve this issue.

In short, Vodacom has ****** R500 from me without crediting the Vodacom number I purchased airtime for and I have been sent from pillar to post trying to sort this out. All I ask is that the number be credited with the airtime I purchased or else have this refunded to my credit card.

If the relevant staff member at Vodacom would be willing to urgently help me with this, I would be so grateful.