I have lost access to the o2 portal, I would like to get my Rechnungen and change my bank data to pay for myhand devices.
Problem: I moved to Switzerland and have canceled my mobile contracts.
Statement o2: They only send this per post.
I need some way how to reset my kundenkenzahl since I forgot or at least get the rechnungen in my email
Edit o2_Antje: Moved from o2 My Handy to English Mobile