Founders with African customers: how do you collect payments from them?

For anyone with customers in Africa (Nigeria, Kenya, Ghana, South Africa, etc.):

How do you collect payments from them today?

What’s been the hardest part of getting paid by customers in Africa?

I’m researching this space and would really like to hear how people are handling it in practice what works, what doesn’t, and where things get frustrating.

Would especially love to hear from founders who sell SaaS, digital products, services, or other online products to customers across African countries.