However, Edward Rooney, aged 65, of Ballinacorribeg, Roundwood, Co Wicklow, and Des Ryan, aged 55, of Belfield Springs, Enniscorthy, Co Wexford, must wait until the New Year to learn of the new sentences to be imposed on them.
In October 2013, Judge Desmond Hogan handed down suspended terms of 10 years to both men after they pleaded guilty at Dublin Circuit Criminal Court to possessing heroin and cocaine for sale or supply on April 5, 2012.
The court heard the men had been under financial pressure when they agreed to transport and collect a bag containing drugs from the UK to Ireland.
President of the Court of Appeal Mr Justice Sean Ryan yesterday said the court was satisfied there was undue leniency in the sentence.
Mr Justice Ryan said the court would reserve its judgment and return it on January 19, 2015.