Unfortunately you're not going to get any sympathy on the forums because you did not do your homework before you made the purchase. Especially if you take an adversarial position and complain about the WGT buy back policy. The specs and policy are all there in black and white, your bad for not reading or understanding it.
That being said, I think you have a better chance of getting your problem resolved quietly via e-mail to members@worldgolftour.com. Sounds to me like you made an honest mistake. Plead your case in a civil manner in an e-mail. Select the clubs you'd like to trade for and offer WGT the deal you are prepared to make.
You want a slower meter. Good news is the Rapture Pros have the slow meter and will last you quite a while. And either the Spider or Daytona putter is slower than the Redwood.
Bad news is it will cost you anywhere from $8 to $11 more to correct your mistake. Add that money to your account to demonstrate it is a good faith offer and send your e-mail today.
Good luck and I think you'll be happy with the Raptures.