Vitality HealthyDining seemingly designed to be impossible to actually get the discount

We had a family meal while on holiday before Christmas at Ocean Basket and had some of the Vitality HealthyDining meal options. As required I sent through the slip the same day. I needed to remember to check in the following day to see the progress and it was declined on the basis of the picture being unclear (it was as clear as daylight to me). There is no option on the clunky app to resubmit so I submitted a new claim on the day after the meal. This was promptly rejected on the basis that it was submitted late, despite the original being submitted in time. Since the meal 6 weeks have no passed. I have since talked with an agent who asked me to submit proof via e-mail. This I have done on the 28 Dec, following up after 3 weeks on 17 Jan and again last week on the 28 Jan. Still no response. No use of having a discount if it is impossible to get and having functionality on the app that is so clunky and does not cater for basic functions that you still need to e-mail which is then promptly ignored.