You will be issued a full refund within a week of approval. The funds will be disbursed to your Steam Wallet or to the payment method used during the purchase.
If, for any reason, Steam is unable to issue a refund via the original payment method, your Steam Wallet will be credited the full amount.
Some payment methods available through Steam in your country may not support refunds to the original payment method. Click here for a full list of payment methods that can accept refunds.