How to read a deeply nested document?

[solveretur]

In my firestore database under the path

/partner/test/communication/00zza91efc5543adac476cc7383ad601/messages/23f59111-6e5e-4510-b342-c6f5906ravc

I store such document

channel : "facebook"
customerId : "00zza91efc5543adac476cc7383ad601"
messageId : "23f59111-6e5e-4510-b342-c6f5906ravc"
text : "How would I know ?"
timestamp : 1566294144185
who : "customer"

And I absolutely have no idea how to read it using react-redux-firestore I tried something like this

        {
            collection: "partner",
            doc: "test",
            subcollections: [
                {
                    collection: "communication",
                    doc: "00zza91efc5543adac476cc7383ad601"
                }
            ],
            storeAs: "message_a"
        }

But it gives me only collection of messages not the specific message I want to read. How to solve it ?