As a temporarily solution, the following option can be used to receive incoming calls.
People who want to reach you, can call at +41215306500, a voice message will ask to dial the Switzernet phone number, they want to reach followed by a # .
+41215306500 -> your Switzernet phone number # (followed by a pound key)
Thank you for understanding and sorry for the caused inconvenience.
The Switzernet Team