You have to read the whole e-mail sent by the Google team and follow the instructions and give them truth about the things going on your website and try to be fair. I don't think so that you will get your account back because once an account is disabled mean its disabled and closed forever. You need to find some other account details and try to create a new account and follow the rules and security options given by Google to prevent this kind of activities happened from your account.
If you think you have done nothing that violate the adsense terms&conditions you can write them and "maybe" your account will be enabled! if their answer is no than the only thing you can do is to use another person( brother, sister, mother, uncle, grand mother, best friend) that you trust to make a new account and the earnings to reach in your pocket!
but they have not told me what's the threat i have give to advertisers? They only gave me a link to FAQ page.. How to appeal and whats the nice way of appealing in my case?
You must be honest with what are You doing. If You clicked your own ads then no way to get your account back
you need to create a quality website. write this: I promise to re-do this crappy site of mine and to create a new one (better quality).