This is all you can do.
Yeah, but I have to select a branch (to send an email to:depending on what branch/ban reason it is): Reclaiming a Hijacked Steam Account, accounts may be temporarily disabled pending verification of purchase information or account ownership (I'm hoping it's this), Piracy or Hacking, Payment Fraud, Redeeming Fraudulent Gifts (hmmmmmm), Hijacking or Sharing Accounts (only with my bro, on different Pc's in the same house).
These are only some of the reasons, but it may just be checking if all my payments are not fraudulent. Is there any possible ways to check this, because I didn't get an e-mail sent to me saying it was disabled.