Cant swich to osx

Hi!

I inställd Windows on my late 2013 macbook pro using boot camp and when I installed it using an ISO file it froze att the setup so I rebooted and then it said that the installation disc was not found. So I inserted a windows 7 installation disc and the setup continued like it should do. The problem now is that I can't swich OS because I don't have any boot camp logo to press. And my network card doesn't interact with windows so I can't connect to the internet either. Please help!