No signal after 24 hours

[97]

When l bought the 02 sim l decided to retain my giffgaff number while using 02.After a couple of months l wanted an 02 number instead and l did this two days ago and was told the new number will be active within 24hrs.24hrs has passed yet l still can't access signal. PAC code was not requested this time, l only got a code as a text message which l sent back to the customer care representative. 

[MI5 · Accepted solution]

@97 

You'll need to call customer service. You can use Skype to call.
Numbers here Guide: Coronavirus Community Help and Support 
When it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say "Upgrade", "Lost/Stolen" or "Fraud" if you have to, to get put through to someone.
8.00am is the best time to call if you can.