Unprofessional delivery service

I placed an order on the Nandos app at 9:38 am today and received confirmation sms stating that my food will be delivered at 10:50 am. I waited until 11:10 to enquire about my delayed delivery. Their phone lines weren’t working then I kept on trying eventually got through and spoke to some gentleman who promised to follow up on the driver and call me back. I waited until I made alternative arrangements for myself. The delivery got to my work place at 12:15. I followed the correct complaints channels but did not get any response. Nandos Panorama should make up their mind if they want to do business or not. They are unprofessional and inconsiderate. We could have died of hunger