I have moved the post as that was an old thread.
You say you tried everything so can we get some more details.
What Hub model do you have (printed on the base sticker)? Have you tried a 60 second pinhole rest of the Hub? If its not connecting after that have you gone in and separated the 2.5 and 5 GHz SSID's - and also turned of "Smart wifi", "Channel Optimisation". Finally have you probed the wifi environment for any other SSID's using the same channel as you are on?
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.