So i have my modem+router on the ground floor of my house from that machine i run a rj45 cable to my first floor bedroom for better speed. This rj45 cable is a cat6 cable which is 25 meters long. Recently this connection stopped working so i checked the cable its not broken anywhere, so i tried connecting this cable directly to my laptop and this ethernet connection was not recognised. I tried to use a seperate router with the same cable and it didnt work either. So my final conclusion is that the port itself is broken. Does anyone know if this can be repaired as i dont want to throw away a perfectly good cable.

I can’t find the point where you’re actually ruling out a broken cable by unsuccessfully testing the cable between one of your switches and a device that isn’t your laptop.
Do that first. Borrow a device from a neighbor, if necessary. Just because you can’t find any physical damage doesn’t mean there’s no physical damage. You want the cable to be broken. A broken cable is easier to replace than an Ethernet port.

Did you forget what subreddit you’re in? This is /r/selfhosted not /r/hosted

The responses here are very confusing to me as well.