Changes: When do they take effect?
Change of contract number: What should I do?
Standing order in case of contract change: What should I do?
Monthly invoice: Why do I now receive it monthly?
Invoice fees (CHF 2.50): Why are these fees now charged to me?
Payment agreement: Is it still valid?
QR codes for payment agreement: Can I still use them?
Telephone consultation for unanswered questions: How can I reach you?