Guild Wars 2

Cannot purchase gems from the store because i get this error when i try to finish my purchase:
An error occurred finalizing your purchase,
already opened a ticket… i would like to buy 800 gems, but i cant. 2 days now!
thank you.

Hello all
Im currently playing engineer. I just dinged 400 on LW and i want to make my set!
I wanted to fix berseker, Power, Perc, Crit. dmg. with berserker gems of couse :P
Im using rifle and elixirs and turrets ( which are VERY squishy.)
I like the raw dmg this spec has, but i was wondering is it worthy making raw dmg?
Or maybe i should go condition dmg?
I read the sticky, but no build drew my attention actually
I like the auto hit, with turrets, blunderbuss risk ( cos u have to go really close with jump shot combo )
so i would like to see all suggestions on that and i would appriciate answers, so that i dont make a set and then dont use it at all
thank you in advance!