Charged for Order never received

I am being charged R10K for an order I never received. I ordered a TV on the 14th of June and after 2 weeks without the TV being dispatched, I went to buy it elsewhere and notified TFG (phone + email) to cancel the order. A week and a half later on the 6th of July, I received an email that my order had been delivered. For over a week now I have been following up with TFG online shop and they cannot tell me what happened to the TV. They only tell me they are sending an urgent email to the courier, Dawn Wing, and their warehouse.

The TV is either at the warehouse or not there; it does not take weeks to verify especially since it was the last of it's model in stock. Furthermore, the courier specifically reported that the TV was delivered to me at my address and not some Warehouse in a logistics park in JHB so it is clear what is happening here.

How many calls and emails do I have to send to get a clear answer as to what is meant to happen now? I have received no courtesy feedback whatsoever and I do not know if an investigation is underway or what is happening. TFG are happy to just leave the charges on my account and they have now even incurred interest and they will no doubt also be reported to the credit bureaus.