no cash refund have to go back later

TRUWORTHS MALL OF THE SOUTH I went to to return a purchase, the cashier told me she has no cash can i come back later , when i told her its impossible to come back she gave me attitude and called the manager, same story i should come back later they have no cash, i told them how this is so inconvenience is there really no cash they said they can give the floats that consist coins there names is Karabo and Thandi not very friendly neither helpful, no apologies, PLEASE CAN YOU PRINT ON YOUR SLIPS OR HAVE NOTICE IN YOUR SHOPS NO CASH REFUND IN THE MORNINGS