What do the lights on your boxes tell you? Got any photos of your gear?
So you’ve got a box where the fibre from the street plugs into, & then a network cable from that box connects to your router which then connects to your switch or?
My country may have a different setup to yours, but the network cable from the fibre box to your modem is the WAN (red coloured) one here. Is that similar to yours?
Hey i fixed the issue i think the problem was caused due to the power cables being switched even tho they seemed to be the same and everything powered on. Everything fixed when i switched em around tho. Also my setup is optic cable>modem>network cable>switch>(tv cable>tv) and netwotk cable>router>pc