How to List South African banks

[oomis]

Hello, when I run the code to list banks, it lists only banks in Nigeria, how can I list banks in South Africa?

This is what I have

paystackObj = Paystack.new(ENV['PAYSTACK_PUBLIC_KEY'], ENV['PAYSTACK_PRIVATE_KEY'])
banks = PaystackBanks.new(paystackObj)
result = banks.list #Optional page_number parameter, 50 items per page
@banks_list = result['data']