Made a payment but still not able to call or use data

[Sham3]

I have made payment, but it’s still not allowing me to make calls 

[pgn]

Your payment takes a few days to clear into O2's account, and it takes a few more days for the block to be removed after service was ceased for s missed payment, @Sham3 - it may be mid to late this week before anything happens to reconnect your phone.

You can speak to the Payment Management Team on 0800 902 0217/0800 032 5302

The opening times are:

Monday to Friday – 8am to 8pm

Saturday – 8am to 6pm
Sunday – 9am to 6pm

Also ask them to help you set up a Direct Debit payment so service is less likely to be restricted for missing a payment again, @Sham3.

https://www.o2.co.uk/help/account-and-billing/payment-support