Access invoices online

How can I access my invoices online? When log in, click on "Mein O2" then on "Mein O2 Starteseite" I go back to the community site (https://hilfe.o2online.de/)

I have currently contracts for 3 mobile number from my family and also for a Homespot. I would like to be able to review the invoices and see the contracts in a convenient way.

Can somebody help me?

Kind regards,

Marcelo