I will get back to you soon.
to sever the connection (between the two―with the other)―cut off the communication (between the two―with the other)
to establish a connection (with something)
to sever the connection―cut off the communication―(between the two)
to establish a connection (between the two―with the other)
will confirm and go back to you
連絡してね。
I'm having the contact information checked.