Razer Pin? You mean Razer Gold Pin? Please do not confuse Razer Pin and Razer Gold Pin.

If the pin is just randomized numbers and letters (without symbols) and it's quite short (ie 9 or 12 numbers) and razer did not protect their end to not receive so many tries at one time, easily a "hacker" can just spam Razer's server to test all sorts of combination. If that's the case, unfortunately, your pin was easily guessed (is the pin something like alphabets and numbers just next to each other like efgh6789ijklm) and the "hacker" picked it up. Well, it's up to e-pay to decide if they willing to give you back your money or give you another pin.