Problems with digital coupons

Each time I try to use my digital coupons it doesnt work at the checkout line. Ive added them in the app and I show customer service and they check to see if Ive bought the correct items, which I have. Customer service reimburses me and they do all they can, but it still doesnt work. Its frustrating and time consuming to have go to customer service after checking out. I wish this could be fixed soon!

Missy:/ about ShopRite Supermarkets, v2.11.2