Device name wrong on website & app

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The device name shows as "Fine8" on the web display and my phone display. When I dig into the Tado settings on the phone app (People -> me -> Mobile Device) it also says Fine8, but I can't change the "Device Name" setting under this. The iOS it displays is correct for the phone. The device name for the phone (Apple Settings...) is not this but something else.

How can I correct this so it displays my phone name correctly?

Thanks

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