Sim cut off for not paying bill in time

[Caber]

I missed my bill payment date so my sim was cut off but I paid it right away and still 4 days later now my sim still hasn't been reconnected but I was told it would only take upto 24 hours? My partner has a sim out through my account too and hers was reconnected after just half an hour or so any solutions? Thanks, ps I've done the usual off/on, airoppane mode, sim out back in etc etc nothing seems to do anything. 

[MI5 · Accepted solution]

@Caber 

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
Or advice from an O2 Guru regarding a way to get through:
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.