unable to connect by ethernet to work pc

Hi, so i’m trying to connect my work pc by ethernet. the pc can recognise somethings connected but i don’t have an internet connection, the same ethernet cable works fine on my personal laptop it’s just my work pc it doesn’t connect to. i’ve spoken to my works IT department and they’ve told me to speak to virgin media as they need to allow my network but when i spoke to them, they didn’t seem to know what i was on about. wondering if anyone has had any similar issues or knows a solution?