If their official support can’t tell you which part of the ToS you broke, I’d leave them and subscribe to another email provider instead of spending too much time finding out the issue with no guarantee that you will be able to resolve it.
If their official support can’t tell you which part of the ToS you broke, I’d leave them and subscribe to another email provider instead of spending too much time finding out the issue with no guarantee that you will be able to resolve it.