Comcast Blocking Reputable Sites. Help!

Hello! My business has a new Shopify site and it is being blocked ONLY on Comcast internet service. The site in question is: https://harborsaunas.com/. 

This site is perfectly safe and google rates it as such. However, when I visit this site on certain Comcast routers it is being blocked. The page has a message like this: "Malware and Phishing. This site is blocked because it is a known security threat. Please contact your network administrator to gain access." 

I have seen others on the web have this issue with Comcast before. I was wondering if anyone has found a work around at the domain level such that Comcast would let this site through it's routers.

Thanks!