accidentally sold item to vendor

[Vyhealimtiho]

Hi, yesterday during guild raid I went to Shattrath to free space in my bags, I was selling some patterns that dropped from trash that evening, and I accidentally sold the LW pattern Sun-Drenched Scale Chestguard which I received from guild mate and was planning to craft for myself and I realized I sold it 1 hr after and the vendor did not have it in Buyback anymore I tried logging to the forum yesterday right when I realised (but unsuccessfully) and sent you 2 tickets via "Contact Us", but no response. Char. name: Vyhealimtiho. Could you please restore the pattern to my character? Thank you.