Full Bag Losing Achievement item

I found out a few weeks ago that you can lose your achievement item if your bag is full sent in a ticket stating that this was a problem and got back they can not help me with a game guide lol...... So im saying again is there anyway i can have a gm or someone check this problem out and is there a way i can get my reward for my achievement? Seeming they dont have where if bag is full item goes to your mail. I think this is a problem please give me feed back on this or someone please fix this problem please

Sorry wrong place to put this =D