How do I buy credit on Orange Money?

Excuse me, I'm trying to understand the process of purchasing credit on Orange Money. Could you please elaborate on the steps I need to follow? Do I need to have an existing account with Orange Money or can I create one during the process? Additionally, what payment methods are accepted for purchasing credit, and are there any fees associated with the transaction? Lastly, how long does it typically take for the credit to be added to my account once the purchase is completed? Thank you for your assistance.