Was this a dedicated server or shared hosting?
Don
Some of it was shared, and another part was on a non-shared VPS. Keep in mind they also deleted the domain name from their nameservers and everything else in my account. (I can't even access the account, as it basically "doesn't exist".)
The domain should still legally be my property, even though I have no control over it.
MaXe - this is sad news. I was a member of your site. Though I haven't been active in the past few months, we spoke not long ago and I know you were getting new themes up for it and everything. Very sad to hear they would do this.
Fullt agree with turner and 3xban here. I hope you have backups. Intern0t had great material.
Indeed, and I remember we spoke as we occasionally do

About the theme, yes that was implemented not long ago and I had even made some custom fixes, etc. I do have backups, but the database is a bit outdated afaik.
The main problem is not backups, but the domain, and a few other things

I've dealt with 1and1 in the past for clients and they are not my favorite hosting provider. I use Dreamhost and have never had a problem. I give them money they give me oodles of space and services. Frankly I say give them bad press, but yeah review that ToS. If anything they should reinstate your domain and allow you to transfer your files off and transfer the DNS records to a host that is a bit more open. I think it is just some paranoia on their part. I sense some dark times coming if Judges are taking down sites and companies are taking it upon themselves to band content of paying customers.
I've reviewed their ToS and if they don't like the content on a particular website, then they are more than free to shut it down without any warning. See 8.6, 8.8 and 8.13 as guidelines that are vague, but describes somewhat that they can do whatever they want.
You're right about the paranoia, it's because of all the people abusing their skills that we, the legit and ethical hackers gets a bad name.
I also think that they should at least, reinstate the domain and allow me to transfer it, including the files I had stored, at least one single database, and a few other minor things.
Have you reviewed their ToS to see if you can build a case against them? This is pretty horrendous and I'm sorry you are having to deal with this. They are essentially holding your intellectual property hostage and I would think you could have grounds for legal action but IANAL...
Did you have backups?
I've reviewed it and a few other friends have too, their ToS is a bit vague, meaning they've basically defined they can do whatever they want to without any warning. It really is horrible, I hope they will one day open their eyes to what Ethical Hacking and Penetration Testing is, or at least just give people a warning to remove inappropriate material or a warning before they terminate your account.
You're right that they're holding my intellectual property hostage (esp. the domain), but there isn't much I can do, except the domain which I may have a decent chance with.