HELP (English, internet connection problem)

Hi! I'm an international student, and I just arrived in the netherlands today, and I'm having a hard time getting my internet set up. It's working intermittently - it'll go for 20 minutes or so, and then drop out, and when I try to connect again it says "The connection has timed out". (I use a macbook pro.) Any idea what could be wrong? I've tried restarting both my computer and the router.

Thanks!
Katie
Sorry if this was in the wrong place, I couldn't understand the category titles.

I suppose you have a Ziggo internet connection?

What kind of router/modem are you using?

How is your Mac connected to the router, with a cable or via WiFi?