Poor customer service

I placed an order on the 25th of April 2022 for delivery on the 04th of May 2022. I have not received any communication and the order was not delivered. I called today, only to be informed that the product is out of stock, this after 11 days of placing the order. No one communicated with me and all they tell me is the product is not available? What if I did not follow up. This is utterly poor customer service and I am not happy. They then inform me that they will refund me after 3 days? This is not how customers should be treated.