Hi and Welcome to the Community Forum.
If your My02 is not working or for some reason a direct debit has failed these are the alternatives to pay your 02 Bill.
How do I pay my bill?
1. Click Here and sign in to My O2
Click 'Pay Your Bill' under the 'My bill summary' section
Follow the easy step by step instructions
You can also pay using our automated payment line.
Call 2729 from your mobile or ring or 0800 588 4217 from a landline and enter the mobile number you wish to pay.
You can also pay using our automated payment line. Call 0844 8090202 or 202 from your O2 mobile and choose option 1.3.
Please Note: Important.
If you normally pay your Monthly 02 Bill by Direct Debit, this may still be requested from your bank, if you make a payment within 48 hours of its due date.
You could speak to Live Chat to discuss your options
http://www.o2.co.uk/contactusOr ring 202 from your O2 phone which is free to speak to Customer Services to sort out the payment. You could also at that point set up a Direct Debit.