Go make a proper appeal if you are able to, posting this here gets you nowhere

It's not this avatar that I am worried about, I use whatever avatar I feel like on steam but dont ever remember that I have an outpost account and that recently lead to a problem. It would be easier for both sides if disabling your avatar was available

To request having your avatar disabled on the site and not be banned?

There's no rule against changing your mind, though they could've done it more directly