Issues connecting to Itunes Store, App Store , Safari , Facetime

So I'm having issues in regards to connecting to the itunes store, app store / safari and facetime also do not work. I have used a windows laptop to see if this issue caused by our internet connection however i can access the itunes store on the windows laptop. I also tried using another mac and the same issue arises so I have come to the conclusion that this issues only affects mac's.