This information is what they have on their site. I believe this company is their partner in Nigeria. Give them a call. I hope this helps.
Seacron Educational Nigeria Limited
(Representative Office of ACCA in Nigeria)
Ground Floor, Right Wing
Plot 259, Etim Inyang Crescent
Victoria Island
Lagos
tel: +234 1 461 6269
fax: +234 1 462 7591
http://www.accaglobal.com/contacts/offices/nigeria