xFi Advanced Security intercept blocking my legitimate website

Hey @CCAntiSpam . xFI Advanced Security is blocking my recently purchased domain (shef.com) for many of my customers. Our old domain (points to the same website) works fine (myshef.com). I've tried every possible channel I can think of to get help on this, and called security assurance 8-10 times and multiple times been given spam phone numbers for offers. Can you please help me get this unblocked? Same problem this guy described with the same image showing what's happening: 

https://forums.xfinity.com/t5/Email-Web-Browsing/artist-website-blocked-my-own/td-p/3266039

Thanks,

Tim