FNB ****** me.

Yesterday i went to ATM branch in Berea Centre branch and i wanted to withdraw an amount of R1500 balance i had. To my surprise there was a charge of R10 of which i did not mind so i was supposed to withdraw an amount of R1490 but the ATM only gave me an amount of R1350 and the R40 was left on the ewallet so i am very frustrated because i lost alot of money on the atm and that other amount did not come out so i feel ****** as to what happened to my R100 because it did not come out of the ATM i am very unhappy because i recently opened a bank with FNB and now this the kind of service you provide to non FNB Customers trying to utilise the service. I need feedback urgently because i will take this further. i really want my money.