do you have the a wallet that has your address one1ytxeedfu6xscs5tqht7h7q4jrnn6vwnz3jaf3n the wallet is used to sign the transaction, if no wallet, then you can’t sign. if no wallet, you will need to recreate your account using the mnemonic or private key which i hope you have a backup
This thread might help you : Delegation/Undelegation Issues using Chrome Harmony Wallet - #19 by FortuneValidator
you can continue there if you want since this thread is for the blacklist discussion Thanks