Online booking - no refund or changes?????

I booked an online ticket for Parow Centre to watch a movie, thinking I would be in that area to collect my sister from her final year exams at UWC. Unfortunately due to violent protests, the exams have been postponed and I will therefore no longer be in that area to watch the movie. <br> <br> I then called the call centre in order to ask for a refund or a voucher or at the very least to change the cinema to one closer to home in the Southern Suburbs but was told that the refunds only work \SOMETIMES".<br> <br> How is it possible that I cannot get a refund for a ticket which I have not used? The online booking is supposed to be convenient but I was now told by the manager at Parow Ster-Kinekor (Alcardo) that if I had booked at the cinema he could have possibly assisted me.<br> <br> What is the purpose of this service? Am I not entitled to a refund or at least a change to a purchase I've made?<br> <br> If this is not resolved"