Pick n Pay ASAP - worst delivery service ever.

Pick n Pay ASAP - worst delivery service ever. Added every thing to the basket, checked the delivery time (today at 17:00) as soon as I paid the delivery time changed to tomorrow morning between 10:00 and 10:30 (when I will not be home) Called customer service as there is no way to cancel an order on the app.... 10 minutes of holding without answer !!