Stick up cam sound volume

When recently installing a counter mounted stick up cam I began to notice that anyone picked up in the live video could not hear my commands. Not until the individual was 2 feet away from the stick up cam were they able to hear me. When i called Ring on how to adjust the volume level so that persons could hear the commands from me from an off site location, I was told that that was as loud as it gets, it is some type of design flaw. This unacceptable. How can I notify an intruder that security has been notified and on its way and that we have your image. This is not a good thing. I need to be able to speak and be heard. The 2-Stick up cam's that Ring sent to me to replace the two older models that were not working at least had enough audio volume to be heard. Help