Therapy does have a power imbalance where the therapist has more power than the client, because the client is dependent on the therapist, and is vulnerable with the therapist. But it is the therapist job to manage that dynamic responsibly, and it doesn't sound like LCM is doing that. Not agreeing to read your emails at all without any clear boundary being set about that initially is dishonest and an abuse of power. Also you set the email so that you could set your own boundary and declare your own needs, and she doesn't seem to be honoring your attempt to do that. She really should acknowledge that you sent the email, and make an option for you to somehow discuss the content of the email with her. Just because she has more power doesn't mean that you can't negotiate things, or explain what your needs are. Consistency and reliability are very important in therapy relationships.