WC3 Classic CD keys disappeared?

My friend can't connect to battle dot net with error

"ERROR

There was an error in handling the request."

- it says this error is when people don't have the game. however, he does have the game

- he recalls having added his classic cd keys to his account but they are no longer there (he thinks they disappeared after he bought reforged then refunded it)
- if he tries to add them again (from the sticker on the CD box), it says they were already claimed