Please can you confirm that the code is actually used, by trying to enter it manually so that you are sure the copy and paste didn't insert any hidden characters.
also please check the claims history in the Trion account center to see if successfully applied.
If you can confirm these things I can investigate other reasons why.
I write the code behind the Trovesaurus website.
A guy who likes mustaches on his characters, adores the Kiwi ally, and may randomly hug!
This user has linked their Trovesaurus account to TroveTools.NET Mod Loader and can display their status and track playtime.