Most likely it's because you already have the native Theta tokens that run on the new Blockchain. It's not an ERC20 token anymore that's why the transaction will not show up on etherscan/ethplorer, only in Theta explorer. Same as your balance in MEW because it supported the ERC20 token from before, not the mainnet.
The swap happened on the supported wallet and exchanges, Binance included. If you're not aware, you can check this blog from the team and the announcement about the launch.
I'm not really sure if you can get your tokens back, the best thing you can do is contact Theta support team directly for assistance.
The swap happened on the supported wallet and exchanges, Binance included. If you're not aware, you can check this blog from the team and the announcement about the launch.
I'm not really sure if you can get your tokens back, the best thing you can do is contact Theta support team directly for assistance.
That's exactly what is going on! I contacted Theta support and they said I will gain my access back once Ledger Nano will support "new" Theta.
Thank you for your help!