Money deposited at ATM

Deposited my monthly rent money, R5000 which is due on 31/08/2015. ATM took my deposit, but an error occur and I got a slip back from the ATM telling me my deposit was not processed. Inside the branch they told me i will probably have to wait until Wednesday to be refunded. I had to write my story on a piece of paper, I got no reference number which is also so unacceptable, because what if the piece of paper get lost and they do not have any contact details of myself.Its so dissapointing because I have to please explain to a landlord why money is not in his account.