Mtn CakeCrush Competition

So Mtn is currently running this "25th birthday" compensation which I played on Tuesday n won 2gb and 50 mb for a day which was no loaded , played the same competition the following day and won 50mb and it was loaded, I called them tp find put about to enquire about the previous day prize and I was told that the had some system problems however and email will be send to the CakeCrush team and I will receive my prize, I spoke to Moeketsi who said I must keep on checkin the balance which will be loaded within 24hours, well 24hrs passed , I called again and spoke to a lady who told me that I must just forget about that free data, they had problems that day and I am not going to get it, just like that, Well I understand it was just a free data from them but I just feel like I wasted my time only to be told" there is nothing we can do" I mean why run the competition in the 1st place