Top up with overseas address on debit card

[rodger_rabbit]

We moved overseas but still have a UK based bank account and debit card. The address on record with the bank is our overseas address.  Debit card is not blocked.

But if I try to top up my O2 PAYG Sim card, the web form and also the 4444 service does not take our overseas post code (which is 4 digits and not recognised as valid according to the web form).

How can I top up?

[Cleoriff · Accepted solution]

@rodger_rabbit 

All ways to top up are here. Guide How to Top Up (PAYG) 

You may have to use the 3rd party mentioned at the end of the guide.