Ref code 15 - error activating mobile data watch 5

[Foxk13]

Hi all

This is my first Apple Watch and I haven’t had any issues setting it up other than I get the below message when trying to connect to the mobile data. I have tried calling o2 and obviously they’re crazy busy at the moment and it just says bye. I need assistance and not sure what to do now if any one has advice?

Oops something went wrong, please try again or call 202 quoting reference 15.

Thanks

[Cleoriff]

@JimSlip 

Check out @madasaf1sh's  reply just above your last post.