Hey Goat! Sorry to hear this, unfortunately we don't always transfer cosmetics etc across accounts, but as this was technically out of your control, an admin may be able to assist you.
I'd suggest making a ticket here:
https://manacube.com/support/
If you provide your new IGN, your old IGN, what you're looking to be transferred and explain the situation, an admin may be able to look into transferring your rank at least - I can't promise your cosmetics will be transferred as this is a complicated process, but hopefully something can be done.