I'm about to kill my self

Hello,that's a joke,but i'm so tilted.
Wanted to play deathknight,need a lvl 55
Wanted to play on lordaeron,i don't have a lot of time to play,and in the character screen creation it says 'lvl 55 in any other realm'
So i lvl a druide at 55 ,wich took me some time since i don't have a lot of it,it was already something.
And then boom,can't creat on lordaeron.
So i'm kinda tilted,since it took me 2 weeks
So I decide to spend 30€ to buy coins and buy a lvl 55 min char
Only char buyable at lvl 55 are deathknight
Remembered u can't have 2 of em on a realm
Went to Icecrown to see if u can,and on that server you can have 2 or more so I was like 'must be the same on Lordaeron'
And it is not.
Can't someone or the staff juste refund me the 30coins and juste delete the deathknight or help me because i'm on the verge of losing my mind.
Thank's

I don't think you can as its on the trade section, as i understand you bought a dk on Lord, why don't you use it?
You can try opening a support ticket in My Account> Support, but as I said i don't think trade purchases are refundable.

I did open a ticket
I wanted a night elfe not an undead
Plus it has no gear no money and already did the quest to obtain gear/weapon
I'm on the verge of juste quitting this right now

Support staff juste answered me,they solved my problem,great job from them
All good !!