Hello! I couldn't get help from hotline or chats. So, I am asking here. I had an overdue bill which I paid via bank transfer. But, I forgot to put my customer number in the reference. What can I do about it now? Please help. Thank you in advance!
Edit o2_Sven 13.06.2024/16:22: Moved from o2 Mobilfunk: Rechnung to English o2 Community: Mobile