Hello, Dennis.
Welcome to the Three Community.
You can reach the Support Team on 333 from any Three phone, or if you're calling from any other line, you can reach them on 0333 338 1001 which is a standard land line number, free to call from any line that has free landline calls.
I'm not entirely sure what you mean by emergency number though, but that's the best way to reach them by phone.
Pete.
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