They must have written proof, but it's nice to have a person that you have actually talked to, deal with your situation. That should yield all the information that you need. Then visit the website of the listed Host and find their TOS or Acceptable Use Policy page. Lastly, don't get discouraged. Keep sharing yourself with the world and don't let a few bad apples spoil the whole bunch.
Most people are good and it is still worth it to be a webmaster and an original content provider.