Worst online experience ever

Placed an online order for a Gas heater on 26 June 2022, with an estimated delivery date of 14 July 2022. On the 13 July 2022 I contacted them to find out about my order the lady i spoke to said she will check with the delivery guys and get back to me but she never did. Today 14 July 2020 when I contacted the store the lady I spoke to mentioned that the item is out of stock they will check with the other stores. Like really the time they updated the order didn't they see they dont have the item? It was my first time ordering from this store their online service is extremely bad!