I checked out your website, and it works just fine for me. Does it say your account is suspended on the client area? If not, it might be your DNS cache.
I checked your domain and it appears to be active again. This usually happens after a temporary suspension expires.
To prevent this in the future, keep an eye on your Account Statistics in the Client Area to see if you are hitting your limits. If your traffic is consistently too high, you might want to upgrade your hosting to a premium plan.