unhappy

i have temp loan with fnb and im getting paid on the 28 the purpose of the loan was to buy stationery and a few things needed so now the too R3000 which was sent to my account this morning and it's not yet my payday and I want to use that money for stationery, they are telling me it will take time 24-48hours to reverse but guys it's not fair the schools are re-opening when am i going to take time to wait for reversal and go buy stationery?