I have already used my credit card to buy KC for myself and a two other friends on SteamKo. After about a week or so I wanted to get more KC. However, my purchase attempts kept failing. I have already filed a ticket to Steam support. I kept getting the following message when attempting to purchase KC: "An unexpected error has occurred. Your purchase has not been completed. Please contact Steam Support." If anyone has a solution or might know why this is happening, be kind enough to let me know.
PS: My credit card works fine with other transactions.
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