Quick follow up: I was contacted by email today by HTC Vive support. They asked for some info such as invoice or order number, age etc. Shortly after that, I received another email with a new code that I used at Steam, and I am now downloading the monster. Thanks Vive for the quick response.
I am having the same issue. After redeeming the 6 mos trial of Infinity, I am unable to go back, and download Half Life. Opened a ticket with the HTC support team, but was told it would be 7-10 days before it could be looked into.