Xfinity blocking my website - website unblocking requests going unanswered

I have created a website for a client and it is being blocked by Xfinity - the website works on all other networks. The error I get is ' malware and phishing - the site is blocked due to known security threats' I have reached out via phone and submitted countless website unblocking requests on the xfinity website. It says I should have a response within three days.  This issue has been ongoing for more than two months still without resolution.  What can I do? Who can fix this? The problem seems relatively common as I have seen lots of posts about this, but I've yet to see updates saying it has been resolved. This is costing my client time and money.

please someone help!