ORDER NUMBER O*** Very unhappy client

I ordered 3 items from Woolworths dash app. Apparently the 1 item was out of stock. Whoever that was shopping sent a message on the dash app that the item is out of stock. I did not get the message from the dash app. My problem with this whole thing why didn’t they call me why would u only communicate with ur clients on the app? Why would I just pay for 2 items including driver fee and tip for 2 things had I been called I would have cancelled the whole order. Lastly why do u place things available on the dash item knowing very well it will be out of stock soon. When I called spoke to an African lady saying to me sorry nana I’m not her nana. I have a first name. She could see my details. You can tell ur clients ur system issues must be the clients problem