In case you didn't do that already anyways: I'd suggest you make a new ticket. It was not really clear, what exactly you want, from what i see here (your copy paste) in what you wrote to them.
Question is also "which" account bound codes you mean exactly. Hence: which items.
In regards to your sentence: "However I also have several old account bound codes/items on him that I would like to use on the character that would take his place"
Their response was completely correct: Normally every code can only be redeemed once, and when this is done, the item is in your toon's possesion, if you bind it, it can not be moved from one toon to the other nor from one account to another. And you basically mentioned here that you'd like another account's toon to receive those items.
I think really it's best you make a new ticket and try to state the exact items you are talking about and the accounts
Cylence! or i keel you ... softly with [The Cylencer]™