How can I apply for Chilean visa when there is no Chile embassy in Nigeria? Do I need to travel to Cote D'Ivoire?
According to the website of the Chilean Ministry of Foreign Affairs, visa applications are handled either by a consulate (embassies also act as consulates, but usually there are additional consulates) or the Department of Immigration.
There doesn't seem to be any consulates near you, so you'll have to contact the Department of Immigration. The page I linked to lists a mail address and telephone number, and it also has a link that opens an email form.