New sim - Not direct from 3 - Not activated - Can't find number

[Joe81]

I've just purchased the new S25 direct from Samsung, included in the deal was a 3 sim.
This sim has arrived but hasn't been activated and there is nothing with the number on for me to be able to activate it.
To speak to 3 support, I need to know the number, but I can't find it, it is not on any of the paperwork the phone was sent with.

What can I do?

[karlc]

Do you have a three account that you can log into?

You should be able to activate the sim from your dashboard

[Joe81]

You need to know your number to be able to create an account.
I don't know the number and have no way of finding it out.