Woolworths are completely useless and going against their values/mission statement

I have purchased some items online for the first time through the Woolworths mobile App. 2 orders were made, one for collection and another for delivery. Each of the orders was made up of 5 Lindt cookie/pretzel packs that were on promotion at 5 for R50. The item was obviously in stock as I had paid for it and scheduled it for the earliest collection/ delivery dates.

Literally 5 minutes before the collection time, when I parked off at the mall to collect my parcel, I received a call from Woolworths telling me that the item is out of stock and they cannot fulfil it. The same occurred for the parcel that I was to receive through delivery however I received a call 2 hours after the scheduled delivery time notifying me that they cannot fulfil the order.

The stubborn employees that called insisted that they had no stock and cannot fulfil it this week therefore I mentioned that I will wait for stock however they told me that they will cancel my order and I will have to pay the normal price which is completely obsurd. They said the reasoning for the special was due the items expiring at the end of the month, so tell me, are Woolworths is selling bad goods??? Everything that has occurred has completely contrasted to their purpose, vision and values which is listed in the Woolworths link below:

https://www.woolworthsholdings.co.za/overview/our-purpose-vision-and-values/

They had wasted my time and petrol as I had made a special trip especially to collect my parcel as the collection date was sooner than the delivery. It is completely irresponsible of them to notify me that they had no stock right to the very last minute if their stock had depleted a few days before.

Woolworths has made a mistake and their app/system is flawed. They need to take ownership of their error! The items were in stock at the time of purchase and I am expecting them to fulfil my order upon receiving new stock and I will not accept anything else! The first step is through this platform. If I am not heard I will use my influence in various other social media platforms to further publicize this which will ultimately defame the brand.