Because I was curious I searched out the terms and conditions for you. Those clearly state that it's not possible to refund any items, I provide the important part here:
* Terms and Conditions apply. By making this purchase you agree to these additional terms of purchase and the site terms of use. There are no refunds for this purchase. All payments are handled by PayPal Inc.
Further I provide you with the right template to be unbanned here:
Name - What is your in-game name?
STEAM-ID - What is your STEAM-ID?
Admins name - Who banned you/who might it be?
Reason - What is/might be the reason that you got banned?
Server - What server did you get banned from?
Time - How long were you banned for?
Story - What happend?
Proof - Any proof on a video/screenshot that clearly show what happened?
Extra information - Any thing you think may be relevant to your ban.
Which you have to post in this section:
zarpgaming.com/index.php/forum/appeals