Lack of transparency by NuMetro in applying the discounts on the movie tickets

Nu Metro’s system is a ****, I thought three tickets this morning via their website.Two tickets are for the same movie and one is for a different movie. Their system is programmed to apply for one ticket discount dispute choosing more than one sit. During the process I’m not prompted to apply for each ticket individually which I don’t understand why should I apply for each ticket when I have a benefit for that. I’m with Sanlam Reality which is another headache because their app has not been working for some time now. When I realised that the system app**** discount for one ticket only I called immediately to get help. I’m being told that unfortunately there is nothing that can be done and next time when I book I should call them, my question is why does this option of online is there in the first place, secondly their system should validate under the seat chosen and auto apply the discount. I want to believe this has been happening with me but I was unaware, this is a **** and I think Nu Metro and Sanlam are aware of this especially NuMetro. This matter should be investigated and their app be updated to support the customer