Pick n pay ASAP is not helpful at all

I ordered on the pick n pay asap at around 12:35 today only to be told that estimated delivery will be 14:30..it's now 14:54 and I have not received my order..the driver called me to confirm the address but sumhow I received a message that my delivery was canceled due to them not being able to get hold of me ..how is that possible..I still have not received any refund and their number on the app is not going through