To clear this up its not possible to turn a F2P account into a legacywith that code, It was only possible to upgrade ur trial BETA account into a retail HoN account. Edit ur post OP so people dont get misinformed.
When using the code you need to contact the S2 helpdesk so they can make the account for you (it will be a legacy), since hon became f2p. Im not trying to give people the wrong impression of you OP but im just trying to make this clearer. Because i had a buddy that had the same problem!