Charged for wrong document sent

I called into general enquires to ask for a proof of transfer I made on the morning of the 11 April. After I check my emails i got a statement. Had to call in again because it was not what I had requested. The second time I received the right document and told how much i was going to be charged. I check my statement on the 12 of April i got charged R26 for the WRONG document sent to me. I did not ask for it. If the recording can be listened to I asked for a proof of payment NOT a statement. I have a statement on my phone i would not need to call in and request for it. I am not happy about this and I hope I will be refunded the R26 i was charged after making the call.