How do I add money to my Zeta card?

Could you please elaborate on the steps involved in adding funds to my Zeta card? I'm relatively new to this process and would appreciate a step-by-step guide. I've heard about the convenience of topping up my Zeta card but am not sure how to proceed. Is there a specific app or platform I need to use? Are there any fees associated with adding money? Additionally, what are the available options for funding my Zeta card, such as bank transfers, debit/credit cards, or cash deposits? Your guidance in this matter would be greatly appreciated.