Banned by Google Adsense?Me too...but why? i didn't do nothing?

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I run a successful website. WWW.kickbox.tk (it's in dutch). On a certain moment a got a lot of pagevieuws. So i though i can make money. so I signed up to google ads. The first week i ve make about 37 euro's. But on day somebody clicked about ten times on one of the advertisements, the next day i received an email from googel telling me that they are going to check it manually. A few days later i received another email(i hade already earned about 60 euro's). They told me that i am banned because i was a serious risk to there advertisers.I've tried to contact them but in vain.What should i do now...................................