Locked account immediately after buying new contract

[Alex2781]

Hello,

I have just set up a new sim-only deal with O2 after coming from another provider. As I tried to set up my online account to access my esim, I was required to enter my postcode and last 4 digits of my bank details. I did this correctly however I was told this was incorrect and after 3 attempts had my account locked. Can someone please suggest a fix to this as I will need to have this number set up shortly.

Thanks

[pgn]

@Alex2781 - you will need help from O2, either in store with photo id, or via any of the many ways in here: Guide: How to find help & contact O2 

Good luck!