Recent test indicated that there's no line fault that can be service affecting.
If most of your devices are connected wirelessly, then signal interference may be causing the dropouts.
You may check these articles to help improve your home WiFi network:
We can also have a Tech specialist to perform troubleshooting along with you to check for any underlying connection issue. Just let us know of your most convenient time to receive a call and we'd be glad to organise one for you.