Q: Can't use phone and media jack won't handle signals

The electrical system repeatedly fails in my car, when I’m on the phone. The whole system turns off, then resets, and the display unit then goes black. In addition, there is a high pitched feedback squeal that can be heard on the speakers. I had the car’s electrical system looked at two different times. They rebooted the electrical system completely one time. The problem was not fixed. Later, after those visits, they told me that you can’t plug a phone into the media jack, which is found in the middle console. And that the media jack is so poor that it can’t handle the variety of electronic signals like voicemail, texting, email, etc. which results in overload of the system. It is aggravating that a 2015 car can’t handle modern technology. And one other problem, the wind noise while driving on the interstate is awful. What is your advice to correct these problems?