Call does not show up on screen

When a call comes in really does not show on notification or display, typically you realize it when you see Missed call very poor poor app. This is been going on for a long time, and these people get paid every month

When I call numbers there is no sound, the person cannot hear me, when the phone is picked up. The ringing on my phone is practically imperceptible, I have an I phone 6S plus. Calls going out or not completed. This is been going on for several weeks now. In the past Ive asked for credit for these issues. None has been received today. Please understand, that if this is not corrected and credit is not received this week I will be porting my number after four years of poor poor service.

In the messaging folder, the list of messages that have been sent as a history should be much much longer than is, it only goes back a couple of days since this is also on software you should have an endless list of messages if you want to keep them if the user wants to delete them then he can delete them but the list should be much longer. When you call out you cant block the number, there should be an ability for the caller to be able to block the number.
Unwanted unknown numbers should be, or should have the ability to be blocked from calling, you dont have an ability to do that on your system. Please develop a system where you can block an unknown caller from calling in.
Would be nice to have predictive dialing, where in after you dial 4 or 5 numbers the system starts producing numbers dialed in the past

Knick fan about Line2 - Second Phone Number, v9.6