iPhone XS max

[Kati]

So I got a contract phone and sim on Friday they said the sim would be activated on Saturday still wasn’t took it to the shop they give me a new sim said it would be activated in 24 hours and it’s been that long and still isn’t what should I do?

[Bambino]

@Kati You'll have to call customer service again to get them to activate the sim. All available numbers are in this link: Guide: Coronavirus Community Help and Support 

Because you're not buying anything, O2 won't consider your call important, so use the Lost/Stolen or Fraud option if you have to, to get through. Otherwise you'll just be disconnected.