How do I pay my Nexo card?

Could you elaborate on the process of paying my Nexo card? As a holder of this financial product, I'm curious about the various options available for making payments. Are there specific channels or platforms that I should utilize? Additionally, what are the recommended methods for topping up my card balance? Are there any fees or charges associated with these payment methods? It's important for me to understand the full process to ensure a smooth and efficient payment experience. Could you please provide a detailed description of the steps involved in paying my Nexo card?