Woolworths Online non-deliverance

I've had some decent experiences with Woolworths before but today I am super disappointed in their online service. I ordered flowers for my Mom's birthday to be delivered today (12 December). With a R50 delivery fee I expected that it would all be delivered on time. I received a phone call from Woolworths at 10am to say that they were out of stock of the flowers I wanted (Proteas) and that I could pay extra for others or find something of the same value. I choose roses worth the same amount. It's 9.30 pm on the same day and my mom never received her flowers. No call, no explanation, nothing.