Debonairs Pizza Appalling Service from Mobile App

I ordered a pizza from the mobile app at 7:34 pm , after an hour the pizza has not been delivered and i check the mobile app track your order function and it now shows shop is now closed at 8:30 pm. This was odd because i tried to call the store before it closed , nobody was picking up just the answering machine . I do not understand why they recommend using the mobile app if ordering through it does not secure the pizza and no one tells you that the pizza is not coming . This was with Debonairs Pizza in Cosmo city .