Best answer by Kash
Sorry to hear that you are having issues with paying the final bill.
You can call us on 0333 003 0001, just to advise you would need to add the +44 at the start if you are calling from abroad.
Alternatively you can do this by logging in to the iD Mobile app or My Account online, going to the 'My Billing' page, and selecting 'Make a payment'. Then follow the steps shown on the screen and click submit.
The easiest way to get this sorted would be to contact us over the phone if you don't have access to your iD Account.