Access to certain websites and web content on other sites

We have lost access to some major commercial websites  to include as example, FOXNEWS.COM . We are also seeing blocked content within facebook accounts that are accessed through our COX internet service. I have called Cox Support several times and they tell me everything is fine from their end but can't see friend postings and picutes on facebook and other sites have blocked content. It has to be something that Cox did as I have no problem when using Verizon service on my cell phones but as soon as I connect using my Cox service , it all goes in the toilet. You can suggest that my wifi router is culprit but NOTHING HAS BEEN CHANGED on that device. I checked. Also tried to access using serveral different computers and operating systems with same results. BLUF: It seems to be a problem with Cox. Yes, Facebook is up because I can access it via my cell phone. THIS HAS BEEN GOING ON SINCE 24 Jan 2020.