Unused Character Boost

Apologies if this is in the wrong place, not entirely sure what I’m doing.

I bought the Collectors Editions of WoD and Legion and they came with a Character Token. Didn’t use the Token from one of these expansions (can’t remember which one it was so mentioning both) as I was saving it for later. Took a game break until BFA and it was gone.

Do Boost Tokens time out and if so can they be given back since it’s an expansion extra that wasn’t used or is it lost to the ether?

Any advice always welcome thanks!

Addendum: did attempt making a level 1 character to make it pop back up as some posts have mentioned but it didn’t work.

Again, apologies if this is the wrong forum

Have an awesome week!