False sale advertising of stock they don't have

I'm so dissapoined with HIFI Corp, they advertise stock that they don't have , they advertised Proline Thinline 14 Celeron N3060 4GB RAM 500GB HDD Laptop for R2999 on their red flash sale. I bought it on Monday 13 March 2023 hoping it will be delivered on time so I can use it to do my UNISA assignment that was due on 17 March 2023, instead of me getting the laptop on the due date of the assignment what I got is an Apology email from HIFI Corp informing me that order cancelled because they don't have stock.