Unacceptable online experience

Good afternoon...I am extremely upset with my online order. I placed my online order on early thursday morning. On the app the earliest delivery date was the 12th of December but no time slot was an option. So the only correct process was to keep aside my order. So I received a call from Woolworths gateway at 9:30am on Saturday morning confirming my order and i was also told that they dont have enough stock of the lamb spare ribs. I ordered 6 but the guy told me that they only have 2. So I asked him like 3 time are you sure you have enough stock of my 4 leg of lamb and my 4 packs of chicken sausage and he said yes so I told him to go ahead and deliver. At 4pm I logged onto my Woolworths app and looked at my invoice and I was shocked so there was no leg of lamb of my order. I called Woolworths gateway and Mahesh told me that they have no stock. And on Thursday when I placed my order there was enough stock but mahesh told me that the walk in clients bought them. How is this my problem. Why advertise if you'll dont have stock and this is not my first experience I had with Woolworth. I believe once I place my order than I should receive what I ordered. I am extremely upset with Woolworths. If I dont get feedback by tomorrow than I am going to publish my article on hello Peter. I order weekly on the Woolworths app and I don't deserve to be treated and let down at the last minute. Very upset and I am going to close down my account and pass this message to all family and friends.

Kind regards Kenusha Mathura ***