visa office, accra

I am being sponsored from nigeria to canada through accra. my interview letter says to come with proof of communication between my husband and i as well as my passport and a few other things.

how do you show proof of communication from nigeria?

Pls has anyone has a spousal interview in accra? what was it like?

does the accra office send a separate passport request letter or can i consider this as such?

does anyone know if the visa can be issued the same day in accra as i am going back to nigeria the next day.

also they say in the letter that there is no guaranty the visa will be issued, is this something to worry about? I have paid for my arc and the deportation cost as well.

pls send any answers you have and thanks in advance.