Unfair treatment and False Advertising

Order # *** I have placed my order almost 24hours in advance as I wanted an item or two on special. One item was peanut butter and the other was a beard trimmer - Both items showed in stock and I made payment. On the day of delivery, 10 minutes before delivery, the app suddenly showed out of stock. I think it's a bit unfair from checkers as I made purchased these items while in stock, in other words I was first and paid for it and then on the day of delivery "out of stock"...