Any type of keys are supported for a time frame of one month. After that we cannot promise that we are able to help you with a key that is not working.
We advise you that you redeem your key as soon as possible, or gift it to a friend and have them redeem it quickly. Alternatively, feel free to request another game as replacement, but only one every 30 days.
Please note if you have any keys showing "potentially not revealed", these are from before the key reveal system and are not new keys.