First and foremost, DO NOT SHARE YOUR PRIVATE MNEMONICS/ PRIVATE KEY WITH ANYONE OFFERING TO HELP. Do not make another MISTAKE PLEASE PLEASE PLEASE!!!
AS A MATTER OF FACT, I WOULD GO AHEAD AND MAKE ANOTHER WALLET BEFORE STARTING THE STEPS MENTIONED BELOW. MOVE ALL THE ETHEREUM/ TOKENS YOU HOLD IN YOUR 0x598E64Caf94bff71838cB4E21233abC619E0B3E3 ADDRESS TO A NEW ADDRESS. THEN WITH AN EMPTY WALLET, YOU CAN PROCEED BELOW.
Now, from what it sounds, you sent your Ethereum Network ETH to a Tomochain Network tmETH address. I may be mistaken but I think you skipped using Tomobridge. Not to worry though cause there was recently a post on this forum about how to potentially reclaim back your ETH.
Here is the link(take not of the domain name and NEVER EVER EVER CLICK A LINK YOU DO NOT TRUST EVER)
Important: For step 3 tomochain is not listed as a coin/token so in this case simply choose ETH as the coin option, then enter the Tomochain Derivation Path which is m/44’/889’/0’/0.
PLEASE PLEASE DO NOT SHARE YOUR KEYS WITH ANYONE AND ONCE YOU GET YOUR COINS BACK I HIGHLY SUGGEST CREATING ANOTHER WALLET AND DEPOSITING FUNDS THERE.