He only gives me an offer to join this great signature campaign without checking account details correctly and after one-year now he has wake up to tell this account is linked to another account.
Like this may be other mistakes also he is doing. Double check his work or find another person who got time to do these things correctly.
Because of his mistake I lost my account today.
So are you mad that you didn't get tagged immediately? If we can get past the fact that yahoo overlooked your account history when he added you then it is still possible to state that he has yet to make a mistake in this entire scenario. Since your account was tagged after the discovery of the linkage to klf, it makes sense to only tag the account
now.