Constant Connection Issue

Since about a week or so we started having constant connection issues. This is right after Cox was out for like 6-8 hours in our area. Starting Thursday we could not connect through my wireless router. I called, or rather chatted with a COX individual by the name of John. After about 20 minutes of going back and forth and me telling him I rest Cox's modem like three times and I reset my wireless router the same amount of times and still had connection issues. John kept saying nothing wrong on their end. So, I guess he decided that was enough and he ended the conversation. After about 5 minutes I was contacted by another individual. Rest and reset and I could get a connection for a short time then lost everything. It was on for a while then told her it seemed ok. At work the next day and wife said Internet going in and out...no steady connection. So, after buying two separate wireless routers and still nothing. Went today to COX and got a Panoramic Modem/Router, hooked it up and still not able to connect to anything on 2.4GHz...….even with the computer right next to the Modem/Router. Anything that could connect at 5.0GHz works great. Now the only problem is that most devices will only connect at 2.4GHz, so there relies the problem. Sorry COX but I think you did an upgrade around 2-3 weeks ago and made life terrible for people. You need to check this issue out because I am hearing from lots of people with the same issue. Also, I am an IT Specialist....so I try to troubleshoot things to pin down the issue. Please, check out the issue before everyone goes over to another provider.