Hey @BenziCat,
As a heads up, I've edited your post to remove the support chat details and to change the font to a normal size so the post can be read.
Sorry to hear someone else had gotten into your account. To be clear, your account was not hacked by EA, but it certainly appears someone had access to your login information and had made some changes in the past.
Our support team actually locked the account to prevent further changes from occurring until we could verify the proper account owner. This is why you weren't able to make additional changes to the account.
Because of that, and since you no longer have access to the email registered to the account, our support team will need to verify some additional details before any changes can be made.
If you're unable to provide enough information matching what was originally registered on the account, they will not be able to make changes.
We are unable to assist with account recovery on the forums, so please
get back in touch with support if you'd like to continue trying to recover the account.