Worst ever

I ordered groceries around 07:00 am on the 30th April form the Sixty60 app. My order was delayed, by almost an hour, I was expecting the order between 08:00 and 09:00. I couldn't go to work because my order arrived an hour late, and after 09:00 to 10:00. They delivered the other items and the driver told me to wait at the gate while he's fetching other items. That was not the only problem. My order delayed to just to be delivered on time, and without and explanation and communication. When I complained via their help email. The agent who called me was very arrogant and told me it's not their problem I didn't even go to work, and they have/will refund me R35 which will only be valid for 7 days. I use the Sixty60 app every month and I have experienced such worst and inconsiderate service and treatment. I'm deeply disappointed by this matte and I'll just escalate it, problem is that I don't know where to escalate this matter for proper and professional feedback. Order number is ***A