Poor customer service by Pick ‘n Pay management

I received a voucher on the Pick n Pay Smartshopper app which was valid for an hour. I had proof that I received the voucher however the app itself was down and I wasn’t able to access the voucher. I tried using multiple devices but the app was still down on all of them. PnP, however refused to help. Management did not help nor did marketing. I was in the store for over an hour trying to get the voucher to work. I am beyond disappointed in the quality of customer service given by Pick ‘n Pay management. In the future I will remain a checkers customer.