Finally I've ordered the better hosting and it's all done. The website should be up and running again very soon, as soon as the DNS changes get propagated. It may take a day or two. The good news is that no data has been lost, all matches will still be there and we'll be able to enter the new tournaments
Once it's working again you can be sure it will stay online as long as my Paypal account works because it's a private server now and the hosting company won't turn it off due to high load like they did before.