Online stock paid for - but not available - takes 3 days to communicate

I purchased a TV online on Sunday, a Skyworth 75 inch for R11 500. Today, three days later I receive an email that the TV is not in stock.

Firstly, why is the link live on your website if the stock doesn't exist? And ironically, the link is STILL live today!

Secondly, why did it take the non-existent client service department three days to communicate this to me?

And lastly, there is another live link on their website for a Skyworth 75inch TV for R12 999 - why si the same product listed TWICE, for different pricing?

I want my SKyworth 75inch TV for the price I paid, before end of this week. Pathetic service - just stay away from Hi-Fi Corporation online!