on 14-08-2019 15:55
I thought they would normally send a text. It wouldn't appear until your second bill but check if you have a bolt on in My O2.
on 14-08-2019 16:12
Yes you should have received a text confirming the discount had been applied.
If you're quick, you can just get one in now Guide: O2 Open & Friends and Family discounts - How to sign up
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)