I should include that this is common sense, but I personally wasn't aware you could get a refund for the game if your account has been banned, apparently you can.
I decided since Arena.net is being extremely difficult with these bans, this would be a good idea for a guide. I can't take credit for this guide as I found this elsewhere from someone else who was permanently banned for the 21 karma norn weapon exploit. I believe this is an unlimited time deal, but it could be changed at any time.
This isn't confirmed as working personally by me, but if I don't get un-banned before Monday after appealing my ban last night, I'll be filing for a refund.
"If you pre-purchased Guild Wars 2 from buy.guildwars2.com and would like a refund, please provide the following information in your submission.
Your Guild Wars 2 purchase Order ID provided in the receipt of the purchase(s). (if available)
The e-mail address you used when making the purchase. (if available) OR If the payment was attempted by credit/debit card, please provide the last 4 digits of the credit/debit card used ONLY.
If the payment was attempted using PayPal®, the invoice ID or transaction ID from your PayPal® payment history for the transaction.
Your billing zip code or postal code."
Taken from their official website, the link is Guild Wars 2 Support | Purchases half way down the page click "What is your refund policy?"
The little proof I have that this works:
Refund accepted and processed: https://i.imgur.com/1pReL.png
Ban proof: https://i.imgur.com/3cx7Q.png
Support response on ban: https://i.imgur.com/T6TNf.png
It would appear that either NCSoft or Arena.net had a support phone number on their website at the time of the ban waves. Those that were quick got the number and called about either a refund or getting their bans lifted. Anet/NCSoft have since removed and/or disabled this phone line, meaning you have to sit and wait for them to respond in support. Meaning this perma ban that is supposed to be changed to 72 hours could take in excess of 7 days instead of previously mentioned 72 hours. Personally I have no faith that they're going to take the hours off the suspension that they take to respond to your ticket.
If I manage to acquire the phone number and give it a test, I'll update here. With how the ban hammer is coming down on first offenders for their mistake, I think this will get a bunch of use on this forum. Enjoy and like I previously said, I take no credit for discovering this, I just thought it would be useful here.