This website lists a number of flight schools in Africa that may be of use to you:

Africa Aviation Schools and Flight Training

I know that DCA offers a financial aid program (if you're willing to relocate to the United States to complete training, which will incur many additional expenses). Make sure you do your research before choosing a flight school or university - places like DCA aren't for everyone...

https://www.deltaconnectionacademy.com/financing.aspx

Here's a place in South Africa:

Pretoria Flying School | Pretoria Pilot Course | Commercial License | Pretoria Airline Transport

Here's a place in Wichita, Kansas (USA) that apparently has lots of experience dealing with foreign students.

Prairie Air Service, Inc

Finally, here's the school I received my PPL at. They have financial aid services and have instructed foreign students, too.

Executive Flyers

Best of luck!