ON BLACK FRIDAY THE APP DOESNT WORK!!!!

Today was black Friday, like how does pick n pay expect us to save if their app doesn't work in the store. I had a welcome discount on my app but because they don't have signal in the store i couldn't use it. The manager was helpful called the call center but they didn't answer in time and i didn't want to keep the manager long as it was busy due to the event of today. I didn't appreciate the app not working and now i have missed out on that voucher and i am very disappointed. I could have gone to shoprite as i also have their app and FNB has coupons for them but i choose Pick n Pay cause i am brand loyal but after today i don't think i will go back as i am disappointed in their app that doesn't work in the store but after my purchase and i got home i checked and it was working just fine. Meaning that in future i will lose out on great deals as the Pick n Pay in new junction is closest to me. Very disappointed.