Payment done on the 11/09/15 but not reflecting

I am greatly dissapointed with how my payment issue has been dealt with, i paid an amount of R4182 on the 11/09/15 and i was able to do a purchase for R630 in October. Apparently now i cannot do a purchase and i was told to wait 48hrs for my payment to reflect. How was it possible for me to purchase for R630? Alisha refused to put me through their finance dept and a few minutes later she told me there is no one to assist me. RCS cards work at Game stores and some Game stores trade till 7pm so if they cant assist between these hours than why be in contract with stores that trade till late? I need this sorted and i want to purchase!