Need help with Twitter Domain Blacklisting

Hello Folks, We are running a public service.. which got blacklisted by some global list for few days (the domain name of this service). As known, Twitter runs some kind of blacklisting automation which in turn depends on global blacklists. We basically run a file hosting service. We managed to solve the black list issue.. but till now Twitter is not releasing the blacklist (tagging the domain as suspicious). We need someone who's aware of what to do, to get this issue resolved. More information can be provided upon request.. *ONLY* request that if you have done something like this before, or you are very sure you can. Also, please.. don't just bid unless you are *VERY* sure you can fix it. Kind Regards..