For those that are living close to Abuja and if you know you have transport and you live far from Abuja,and you applied for the customs job,i would advice that you go to customs headquarters Abuja to tender your documents and enquire more.
Customs Headquarters,
Wuse Zone 3,Abuja,
Ask for the DCG,Enforcement unit.
He would tell you what to do.
Goodluck folks