Everyone has to complete KYC. It is normal. If they want you to send a selfie pic with the ID next to your face then some doubt exists about your identity or docs.
If you want to argue with them about what documents you will or wont send nobody can help you.
If you want SBR to get some sort of guarantee about a time frame, that can't be done. The process takes as long as it takes. Usually a day or two. Sometimes a week or two. Rarely longer.
The SBR complaint form is here but I strongly suggest you be patient and wait to hear back from them when they are ready:
http://www.sportsbookreview.com/sportsbook-complaint/