Thank you for reaching out to the Community! I'm happy to provide some assistance with locating a payment provider for the shop, to ensure this gets resolved.
To share some insight, Shopify has integrated with over 100 different third-party payment providers to allow you to continue accepting credit cards online. Due to this, I encourage you to check out this complete list of all available payment providers within Zambia. We currently offer over 20 different third-party payment providers within this country and encourage you to check out the list to locate the provider that best fits your shops needs.
For any questions that you may have regarding a specific payment provider, I encourage you to connect with them directly. They will be able to share more information with you and answer any other questions that you may have.