Most all KGB deals make you login to the vendor's website, order the product, and use your KGB voucher code at checkout to zero out the payment since you already paid KGB for the deal.
I bought a KGB deal for hair extensions and the voucher code will not work. I have emailed KGB numerous times only to be told to login and click on "My History" for resolution. The link is broken and they will not respond otherwise. The vendor, EDD Products USA, will not respond either.