PnP-ASAP failures

I joined the Pick and Pay ASAP app, was offered a R50 discount voucher code for my first order. I placed the order but the discount code would not go through. Got my order but lost the R50. I complained by email and after several days silence, was given another R50 code. I placed my second order but the replacement code would also not go through. So I lost the R50 again and from an order or 5 cans of baked beans, only 4 were delivered. I complained again via email (phoning doesn't work at all), and now, going on 2 weeks later, still no response. I got most of my groceries delivered, hence 2 stars, but am not a happy shopper. The problems are minor but what makes the red mist descend is the poor "support" underpinning the app and being IGNORED! Doug