Dashboard currency converter messed up, cant afford this thing I got from ebay!

Ok this is relay annoying, the currency converter from the mac dashboard has completely messed up and told me the wrong info. So I then went to ebay and got all this stuff (which I played for) I then find out and go OMG I don’t want to pay for all that but I already had. At the back it said yahoo so I went to yahoo and redid the conversion on their site and it was the right price.

So um now what do I do? Is there anyone that you think I can contact?