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Hi @CJohnstone
Welcome to the Community!
What are the troubleshooting that you've performed? Have you tried to forget or delete the saved networks on your Lenovo notebook, then try searching for the WiFi network again?
If you've already done it and still not showing your WiFi network, then we need to arrange a call from our Tech team to check on this further.
Please send me a PM with your TPG username or customer ID number along with your preferred time and best number to be contacted.
BasilDV