How do I pay my slingshot bill?

Hello there, I'm curious to know about how one goes about paying their slingshot bill. Is there a specific process or method I should follow? Could you please elaborate on the steps involved in making the payment? Additionally, are there any fees associated with paying the bill, and if so, what are they? Lastly, is there a deadline by which the bill must be paid to avoid any penalties or additional charges? Thank you for your assistance.