Can't install RIFTFollow

My computer has a clean hard drive, no Rift files. Bought the game from gamestop, created an account and tried to apply the game code from the box. I keep getting a message, cannot redeem this code at this time, try later. I've been trying for two days, contacted tech support. I received an e mail, will get back to you in 24 hours with a solution, that didn't happen. All I got was a bunch of links with possible solutions, none of them apply. The tech support here really sucks. You'd think with a new game code, you would get an express track to a full client download. They got my money, shame on me.

You're right, I have the full client download which will only load if the product registration code is accepted. Its not being accepted, and tech support isn't coming up with a solution.