Very bad delivery and customer service

After many years of shopping at Clicks, I've had enough now. It's been a week since I ordered essential items on the Online App. Received notification on Friday that it's out for delivery. Nothing. Phoned and emailed yesterday to be told I have to phone back after two PM. I phoned back- promised me a call back soon. Today still no delivery. How is this possible? I won't be buying from Clicks again.