The Confederation of African Football (CAF) said Rangers appeal was not admitted on technical grounds.
But the Enugu club have disclosed that they will table their case before the Court of Arbitration for Sports (CAS).
“We’re going to appeal this decision at CAS,” said Enugu FA chairman Chidi Ofo Okenwa.
“This is miscarriage of justice. There is no way we are going to rest until we are justifiably heard.”
“Rangers will fight till we get justice. We are being victimised and CAS remains our only hope for justice,” added Rangers general manager Paul Chibuzor Ozor.
The Confederation of African Football (CAF) disqualified Rangers Confederation Cup for fielding an ineligible player, goalkeeper Daniel Emmanuel, in their final qualifier match against CS Sfaxien of Tunisia.
The Tunisian club have now replaced Enugu Rangers in the mini-league stage of the Confederation Cup.