My phone allows a blocked call ONE RING. Any way to get rid of this?

Going crazy. Chat does not help. Having a really hard time with this. Ooma allows a blocked caller ONE ring. Ooma is my home phone but I can’t find anywhere else to post this, and Ooma seems to be no help at all except requiring a reboot. I was ok with this until I started getting blocked calls in the wee hours, waking us one with the one ring. Can ANYBODY help us here? .