552 5.2.0 bounce error sending group emails!

I have been doing battle with them on the group e-mails since the port change a week ago.  I talked with 7 Cox reps two by phone and 5 by online chat and none of them mentioned them cutting the group limit to 8 was the magic number I heard from another customer here on the forum.  I had it escalated and they have my cell number and this was on Tuesday and have not heard a thing.so having this limit would blow me out of the water and when you tell the Cox people this they respond well the e-mail is a free service which is pretty much saying they can do what the heck they please.  I think most of us buy a product because of the package and if Cox would not have had the e-mail accounts most of us would not have gone with them so it is not a FREE service it is more like false advertising.  Anyway I set up an account on gmail so I can still send my bulk emails without breaking them down into small 10 person groups and I have like 15 groups ranging from 17 to 95 people in the groups so that would be a lot of work splitting them up and sending them out.  First of all when Cox have an issue like this they need to inform all their customer service what it is that is wrong so they are all on the same page but it worked out that every time I contacted a Cox rep I had to start all over like they knew nothing about what was going on.  I worked in IT and Telecommunication for like 40 years and when we were making a major change or changing systems or software we always had a contingency plan to go back to the old system in order to not cause any pain to our customers but customer care is not something Cox cares about.  Another story which makes me believe this 10 group limit is not true is that yesterday I belong to this Model RC club and I received an e-mail from one of the members that had 49 people in the group and he is also a Cox customer so I asked him if he sent it as a group and he said no because he did not know how to do groups but he had brought up an old email from a couple days ago to all the members and did a "Reply To All" and it went out fine and I got my copy so I thought well maybe Cox fixed the problem so I took that same e-mail and did a Reply To All and it failed just like my regular groups failed with the same error code.  So one of the other customers on this forum mentioned she was setting up a gmail account so she can groups and so I did the same so that is what I started using this morning and so far all is okay but last night before I turned off the laptop I tried sending to my group of 17 using my Cox account and it sent okay so I thought well maybe they have it fixed but when I tried to send to that same group this morning it was back to the same error message.  Another check I did I had a friend send an e-mail to the same 17 people putting their names in the TO field one at a time using Outlook and had him send it and it worked so I thought well maybe if I do the same thing I can get at least my small groups to go so First I used Thunderbird and put the names in one at a time and sent the e-mail and guess what it failed with the same error message so I tried it using Outlook and got the same failure so I tried it on my iPad ad got the same results so my conclusion is they have all the users identified that were using group emails and put a limit on our account.  So looks like they are discriminating against the e-mail users that use groups and I may have to talk to my attorney to see if anything can be done.  By the way this is the second thing they took way from me from my original contract.  Those of you that have been with Cox long enough know they used to provide 10MB of space for it's customers to have their web site and I was hosting my web site on that space and then all of a sudden they say not enough people were using it so they stpped it and ony gave me a month to do something else so that was more of their good customer care service.