Is it possible to get refund?

I dont know if thats possible or not but i would like to get a refund. Today i accidentally bought premium “Tiger II H” instead of 5000 gold like i wanted (dont ask how i managed to mess up like this) i didnt spend any gold that i got from this pack and premium account is still on 7 days mark, i tried playing on it a few matches so thats why i have more sl and exp than before, but you can just remove everything i got from playing with it.

you would need to send a support ticket in asking
just follow this link - Gaijin Support