Really sorry to hear you're having trouble with this.
Although the boxes can be connected via WiFi, it can be unreliable depending on environmental factors or the topography of your house. If the signal strength isn't enough then we would recommend using Powerline adapters.
Powerline adapters utilise the wiring in your house to allow you to connect devices to the hub.
Let me know if you'd like to know more and I'll help you out.
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