Due to a bug that caused a single item in the mailbox to appear as two, only one of which had an item attached, as seen here in a different instance that the same bug occurred: , I managed to delete my Guardian Pack while it was still attached to a letter in the mail (by deleting the letter that did not appear to have an…
You should check the support system via the website. The ticket I submitted in-game also disappeared from the support window in the game, but when I checked the website it had a communication and an attempt at resolution. Unfortunately for me, the resolution was completely useless and didn't help at all. Good luck.
Upon completion of the Rags to Riches quest, I checked my mail to see if I had gotten the Guardian Founder's Pack. I had, but I received two identical letters, the only exception being that only one of the two had an item (the Founder's Pack). I traveled to the mail courier and opened my mailbox. The open letter did NOT…