Double transaction at gate

On Sunday 4 April 2021, we went to the Kruger Park for the day via Crocodile Bridge. The lady who assisted us with our payments etc said that the machine is giving trouble. I told her to wait as the card machine would decline the transaction automatically if the signal is that bad. She refused to listen to me. She insisted in putting the transaction through on a different machine. I told her that the funds will go off twice as the machine did not decline anything. I told her again that the first transaction has already gone off. But she just did what she wanted to do. Afterwards I showed her that I just paid a double entrance fee. She scribbled down some names and said I must e-mail them. One of the addressed doesn't even work or I am just not able to read her handwriting. Please assist in refunding me.