Inconvenience and dishonesty in tern of fulfilling your customers expectations

I placed an order on the 29th of November 2024 & promised that my order would arrive within 5-7 working days. On the 03rd of December 2024, I receive an e-mail apologizing advising that there is a backlog & they are experiencing high volume of orders, which result the shipping delay it will take a 13 – 15 business day delay & they would contact me when my package is ready for delivery. I have tried calling Adidas South Africa from the 07th to 12th of December 2024. Only to receive an email this morning cancelling my order due to out of stock items, however on your website the item it is still showing available and the sizes. I tried to place an order and it still allows me to continue to checkout at an original price, which it means the stock is available but you betraying your customers. Why you had a massive sale if you know you'll not fulfill your customers expectations. I find this soo unfair, I had other things on my wish list for a Black Friday I would have use my R1500.00 on other things. Now I have to wait 7 days for my refund while the Christmas Day it is around the corner. I would appreciate if you can credit me and still offer a discount on the item as is still showing online.