I would be leaning towards no.
Not only is your appeal terrible, this wasn't the only account you xrayed on. You (or your friends, or you and your friends) xrayed on the accounts "Gx_Power", "l2elaxx", and "l2elaxxNOOB", gaining a total of 400 diamonds, within the first 3 days of the map reset.
All this while applying for mediator, no less, which I can only would have been abused to also give yourself some sort of illegitimate advantage.
So no. I think you are a fairly dishonest person who will take any method possible to gain an advantage, legitimate or not, and I am not convinced that it won't happen again, as tempting as the smiley face is.