HubertEiermann Welcome to the community!
Please contact our support at 0800 66 88 66, please share with them some examples where the calls did not work.
We need this information:
- A number: your landline number
- B number: the phone number of the caller
- Date and time of the call
The examples should be current. The employee will create a ticket for further clarification.
Greetings
Daniele