ATM withdrawal dispute

Kindly assist, had an issue withdrawing funds from an ATM at mabopane, after trying to get 3000 @ 16:01 the ATM gave me a slip that said transaction could not be completed. And I figured it the machine did not have funds... I proceeded to another machine. And used eWallet to withdrawal as I had been using careless withdrawal and was successful @ 16:03, I then received an SMS for the first failed transaction saying I had withdrawn R3000 but a slip with the ATM number says the transaction failed I never received funds. Please help.i am trying to follow up on the dispute I lodged.