Unable to access o2 bills after changing network

[Helen1745]

We have had two recent episodes of CONFIRMED fraudulent activity on our account.  Every month for the last three I have had to contact the company, but despite this they continually allow changes to be made to the account.  The fraudsters were changing my email so that login authentication emails went to them. Agents have cancelled the fraudulent purchases and credited my account. For this reason we changed to another network last month.  I have now received a text message from o2 saying final bill will be in excess of £200, to be taken by DD on 5th Jan.  My normal bill of £21 per month has a zero spend cap. I  no longer have access to any billing online. I can login to my o2 but says I have no products. There is no email for customer service and I can no longer use 202 to phone them.  I have cancelled my DD authorization but don't know how to proceed now.  Any advice? Please?
Helen

[MI5]

@Helen1745 

You can get in touch with Payment Management team on 0800 902 0217 or 0800 032 5302.

Payment Management opening hours:

Monday to Friday – 8am to 8pm

Saturday – 8am to 6pm

Sunday – 9am to 6pm

[jonsie · Accepted solution]

This looks like something you’d need to call O2’s customer service team about – give them a call on 202  or 0344 809 0202

Use the specific Payment management number  0800 902 0217

The opening times are:
Monday to Friday – 8am to 8pm
Saturday – 8am to 6pm
Sunday – 9am to 6pm

Guide: How to find help & contact O2 

[Helen1745]

Thank you to both Jonsie and M15 for your prompt responses.  I will try tomorrow to use the contact number you suggested.