They just updated the news page:
http://www.gamersgate.com/info/holiday-sale-issue
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If you have managed to access at least one serial key
This means that we were able to complete your order. As difficult as it is for us, we will be honoring the price that we advertised and you will get to keep all of the games you bought – we’re currently waiting on serial keys to complete your orders and will deliver them as soon as possible.
If you have not managed to access any of the games
This means that we were not able to complete your order, and have therefore reversed your payment. We understand the disappointment that you have experienced especially during the Holiday season and as compensation we are providing your account with a 20% discount valid on all purchases on the GamersGate site until 31 December 2013. In the few cases where discounts are not permitted, we will do our best to provide similar compensation (e.g. the equivalent amount in Blue Coins). The discount is not valid when purchasing Blue Coins.
We want to apologize for these mistakes and the amount of time it has taken to resolve everything. It is possible that there are some who may be “stuck in the middle” and we would like to direct them to our support team so we can help you individually. Please be aware that due to the above issues, our support team is under heavy pressure – we will be answering all tickets we receive, but it may take longer than usual until things calm down."