The first issue is that the volume control (and mute) do not work consistently on our main TV. The second issue is that Prime video streaming often buffers then indicates the wifi doesn't have enough Bandwidth. Call to Verizon support went unresolved with only an offer to replace the remote. Since we've only had the service a week, we asked to cancel but was only offered a refund of the days of interupted service. How can I get Customer Service to respond?