Paying my bill

[Lita1]

I can’t seem to log into my account to pay my bill, it’s saying my number is already registered with another user, I’ve recently got a new sim so I’m not sure if it’s referring to my old number 

[TallTrees]

Hi @Lita1 

It's probably necessary to contact o2 customer services here 

Guide: How to find help & contact O2 

                        OR

Social Media if that works best for you -on Facebook (https://o2uk.co/O2CFB) , Twitter  X (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG)
Or you can call them on 0800 081 0255.

[MI5]

@Lita1 

You can get in touch with Payment Management team on 0800 902 0217 who’ll find a solution that’s right for you.
Payment Management opening hours:
Monday to Friday – 8am to 8pm
Saturday – 8am to 6pm
Sunday – 9am to 6pm

Guide: How to Pay Your Bill (Airtime & Device Plans) 

Setting up a direct debit will avoid future issues.