Help with Fedex!!

  1. Hi girls, I am a very new ebayer. I opened a new account with fedex and plan to send a package to my buyer who is in Canada. So, I go on Fedex website and organize shipping label, but cuz shipping fee is too high so we argeed to send this package with USPS. But I found out just now, I got charged for my credit card (I assum cuz I organized and downloaded that label). Does anyone have an idea of what happened to me? and can I get my money back? They charged me for $155:crybaby: :crybaby: :crybaby: thank you for advice!!