Poor Stock Control / Bad Service / No refund

I placed an order on 30 November 2020 (#2406) and paid for it via online payment (direct EFT). I received confirmation of my order on the same day. On 2 December 2020 I was notified that there is no stock available. After contacting the company, asking them to explain this to me, and receiving excuses - the call was ended while I was still talking to the person insisting to get a refund for these items. I received another e-mail to ask for my banking details, which was provided immediately. After more follow up e-mails, to date, I have not received my refund.