ooma Core VoIP Phone System with No Monthly Phone Service Bills This instant

the ooma phone has been not working for over 2 wks after it only worked a short period. we tried multiple times to call their customer service, just no way to talk to any one or even leave a message. we emailed them, no response yet. we'd like to return the phone if it's still refundable?Get more detail about ooma Core VoIP Phone System with No Monthly Phone Service Bills.