I was playing a game of Supremacy1914, I opened to stock market to buy some oil from other players, but I accidentally clicked on the "Resource Offer" button (the one that spends Goldmarks for resources). The game instantly spent 2,000 of my Goldmarks without even giving me an "are you sure" warning or anything. I haven't used the oil I bought with those Goldmarks. Is there a way to reverse it? If not, is there a way I can prevent this from ever happening again?