DASH_ERR04: The account number in the target address is invalid.
I am unable to download my bill and get the error message above. I see this is a old issue which obvioulsy has not been fully resolved. The solutions proposed by the O2 Community are not working and I routinely need to have copies of my phone bills which is incredibly time consuming considering the trivial nature of the task. O2 must do better. The complete lack of customer service adds to the frustration!!
Can anyone help?
Not sure what you've tried but logging out, clearing cache and cookies and trying again sometimes helps. So does using a different browser. Edge seems to work well.
Otherwise, you'll need to speak to customer service, numbers here Guide: Coronavirus Community Help and Support
Or 202 from your O2 mobile.
Advice from an O2 Guru to get through:
When you call 202, you will be asked for the reason you are calling.
Stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
You can also try saying "Upgrade" or "Fraud" to be connected to an advisor.
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here