Very Bad Service from Woolworths online

On the 19th of June 2022 I ordered items on the 3 for the price of 2 promotion. Al items I ordered were in stock for the sizes I wanted. Surprisingly on the day of delivery I get an invoice that shows only 2 items will be delivered because they 3rd item is out of stock. Conveniently for Woolworths the item that is not being delivered is the one that was said to be free. That meant I still get charged normal even though when I bought the item is because it was a 2 for 2 sale. I contacted your customer service where I spoke to Abdul April who promised that his manager Amanda Arendse will call me back at 11h00. I never received any call or written feedback to my query. I find it a very unfair treatment to customers to let us buy items that are on sale and when its time to deliver I am given items without the promotion. I didn’t take the delivery as advsed by the call centre agent because it didn’t have all the items that I ordered. Woolworths sold me items under false advertising of a sale and then turn around and say they are out of stock whereas when the payment was made there was stock for all items. Days later stock still showed availabl online for the items and sizes i wanted. 30 June 2022 i sent a complaint via email which was never responded to. I commented about my disatisfaction on their Instagram post on 04 July that's when Cindy Arendse attempted to call me on 05 July and eventually spoke to me on 06 July. I got a wack apology about the agent that assisted me being new and not escalating the query. The email i sent and didnt get a response on was a non issue on their side. I was told my money will be refunded within 4-7 days. Today 20 days later i am still waiting for my money.