Explanation of transactions

On the 25 of July I loaded my Gaitrain card for an amount of R1331 using my fnb cheque card. FNB send you notifications fater a transaction with the bank balance. So it showed that my bank balanace had reduced by this amount. It showed my balance. Days went by then again my balance reduce by R1331. I called fnb to get an explanation. I as told that they did not take the amount twice. On the25/07 it was reseved. So I asked how did it then reduce from 18000 some chamgenge to 16000 some change. Then again in august reduced by same gautrain transaction mount.The lady it did not and tried to go through the trabsactions online.which by the way are not in.order nor do they show on correct dates. I askedher to call me the next day as I really did not undertand her explanation. She did not call at the specified time. I get an email saying we tried to call you and could not reach you. I tjought to myself ofcourse as I gave you a specific time to call. I wrote another email with my preferred time still no call at that time but got a call at a different time. Till today o do not know how my balance reduced twice by the same amount.