I'm in the middle of CS hell. The number on the web page with the code, 1-888-716-7994, has been useless. The first CS agent told me that the code isn't activated, and he can't do anything about it, and he gave me another number to call-- which turned out to be the Best Buy Canada main help line (I'm not in Canada). The next CS agent told me that all three of my codes expired on the 6th, even though they say they're active from July 5-15, and she can't do anything about it.
There's a Best Buy Cashstar
site for activating gift cards, but it just tells me it can't activate the codes.
People on the Best Buy forum are
complaining that their codes don't work, but I haven't seen any useful responses yet.
Edit: The second CS agent from 1-888-716-7994 eventually connected me with another agent who was able to help. That agent offered to send me a non-expiring gift card of $50. It'll take up to a couple weeks, and it took something like 40 minutes of my day, but at least I wasn't totally SOL.