Useless Smart Shopper card vouchers

I've had a PnP smart shopper card which has, up until now, worked fine. I have the PnP smart shopper app on my mobile device which has worked very well until this last week, when for some reason only known to "smart shopper" the selected vouchers which are selected via the app and are downloaded to the card, are now not discounted at point of sale. The manager of my local PnP again selected the vouchers via the in store terminal and downloaded them to the card and even printed them. Still at point of sale the vouchers are not discounted and full price is charged for the items. This issue has been reported to "smart shopper" who only insist that the said vouchers must be "loaded" WHICH THEY ARE. The problem has been reported to "customer service" who apparently have escalated the problem to the "help desk". Well, sorry not much in the way of "help" from them, they don't even have the courtesy to respond to me as to what they're doing or what they've found. Needless to say PnP is going to lose me as a customer. The frustration dealing with the "smart shopper" call centre us simply not worth it. I'd rather just go to Checkers or Spar.