ISP: Internet Service Provider. It's whoever provides you with your Internet access. If you rent your router/modem from your ISP they retain the ability to make changes to any and all settings, including the security setting we are referring to. If you purchased your router/modem yourself, then they should not have access to those settings, unless you granted them access.
What should I do once I get to those settings i been trying to fix this for hours and still the device won’t show up anywhere
Without knowing your specific hardware (make/model), we can't offer specifics on where that setting might be located or even exactly how its labeled.
