Ring Alarm Keypad Volume not changing

I need help figuring out why the volume on my keypad will not turn down. My keypad and base station are very close together and I only want the sound to play through the base station. Every time I go to adjust the volume for the keypad to be set to 0 it never changes the volume on the keypad and stays at its max volume. Also after the chirp sound plays there is a pop sound coming from the speaker that follows.