I have Terra Classic LUNC coins in my Atomic wallet but I can't send them any where or even exchange them for another coin. I have contacted Atomic support this is what they said.
If you can access your seed, try to import it to another wallet like the terra station wallet extension. I don't know exactly the link but I find the article how is
work. First, you must be careful about phishing and scam, I'm worried the email you received is maybe from the scammer who tries steal your balance.
That should not be possible if they are both BIP39 wallet and they are. The seed phrase may not be correct. Also try it on other wallets that support Lunc if not successfully done on Exodus.
most likely BIP39