Did you checkout http://www.angelfairafrica.com ?
http://techcrunch.com/2014/02/23/u-s-investments-surge-for-african-tech-entrepreneurs/

It does not matter where you are. Most of the Angel or Seed investors associated to startup accelerators in US or UK are accessible to anyone in the world as long as there are no Trade embargo or sanctions.

Also you or team should be able to travel to these countries on business or tourist visa in person if selected.

Process is easy
1) Create a POC/Mockup or working protoytpe
2) If you can sign up early customers..nothing like it...
3) Assemble a pitch deck

Feel free to talk to me...
Incase you are not able to pay, just let me know..
I will get a free pass for you and we can talk 30 mins .. happy to help..

I am in contact with people who work for Pencil of Promise projects in Ghana.. Are you familiar ?

Nefin