No Delivery, Terrible Customer Service

I have ordered from Woolworths online thinking it is a trusted brand. My order was suppose to be delivered on Friday, they even scheduled a time slot of 10:00 - 13:00 for your convenience, during which they will deliver. I waited the whole day with no success. On Saturday morning I phoned them and the woman on the line said they will deliver the same day. She could not provide me with a reason why they didn't deliver on Friday as scheduled. I asked her if I can cancel it and rather pick it up from a store as I needed to get these shirts to printing ASAP. That however was not possible. She phoned me back saying unfortunately they will only be delivering on Monday, but I need not worry they will definitely deliver between 10:00 and 13:00 as scheduled. I was on hold now for 24 minutes trying to reach someone to tell me where my delivery is. This was truly a horrible experience. I will NEVER use woolworths online again and I will definitely not recommend them to anyone.