You can create scam accusation thread against them in this board: https://bitcointalk.org/index.php?board=83.0 check and read the pinned topic to see how to post scam accusation thread.
Although I doubt that you will get an answer from bitz.io representative since he has been inactive for a month already now.
At least you can also help the community to aware about this situation and if your allegation is valid then you help the community to stay away from this site.
By the way, did they tell you about which rule you broke and did they provide the proof that you broke the rule?