Name Change / ID contains a prohibited word or character

I recently attempted to sign up for an Origin account under the username qwertymodo. This is a username that I have used for over 10 years on dozens of sites without any issue, and one of my criteria in choosing it initially was that it not be offensive. However, apparently Origin disagrees with me and every other company I've done business with in that time on what is and is not considered an acceptable username, as I was told when attempting to sign up that "ID contains a prohibited word or character". I attempted to resolve this through phone and chat support. During my initial phone support, I was told that they could not determine why the username was being rejected, but that they would call me back with more information. That was a week ago, and I've heard nothing. So today, I contacted support again via live chat. During this chat, I was disconnected twice and when I finally did manage to speak to somebody long enough to present the issue, I was again told that they couldn't determine why the name was rejected, but that they could escalate the case so that I would be able to find that out. I just received confirmation that the case was closed with no further information.

Look, I understand why you have this system in place. I get that you are trying to sort out offensive usernames. But the fact of the matter is, you have an overzealous automated system. In addition to that, your support staff can't even tell me why the system flagged the username. Even if I wanted to try to modify the name to fit the rules, I wouldn't be able to because nobody will tell me where the problem lies. However, as I said, I've used this name for over 10 years. It's basically my online identity, and telling me that I can't use it with your service is basically asking me to change that identity, which I have no interest in doing UNLESS SOMEBODY CAN TELL ME WHAT THE PROBLEM IS. Even then, given the fact that I've spend over an hour with support being run around, given no help, disconnected multiple times, told that I would receive a callback, or that my case was being escalated, only to find that neither was true, I'm really at the point of simply saying that I will take my business elsewhere.

If my post comes across as rude or demanding, it's only because I tried being polite, only to get treated like * by support. I'm just looking for a simple answer to my question. If there is no way to manually review usernames and override the automated flagging, then the system needs to be changed, because obviously it's broken.