Move your domain to Njal.la, or buy a domain .to, .cr, .org, .is, .co to avoid domains suspension. You can transfer your domain to Njal.la, you need to disable your whois protection or change your domain name!
You received the email because in Whois Proxy, some emails are forwarded to your real email account in whois.
This is the reason behind it, another they found your email in any contact form or old whois.
If you hosting doesn't say to remove nothing, don't worry. If your hosting says to remove, just move to other hosting offshore.
If your hosting has send the email or ask to you make a action delete, or remove that is because is not really offshore, change hosting! You have a thread with good offshore hosting here.
That is how things work. Make a move! Switch! Change! Easy.