It's not the car, it's the radio, Most am car radios do this,  Don't
have a fix for the phone charger but for the heater you might try a
noise suppressor kit. It is a couple of braided wire ground straps
that go from the hood to the firewall , and from the radio to the
nearest metal  part of the dash that is connected to the body of the
car. Most car radio shops should have these.  Also older AM radios had
an adjustment for sensitivity , I forgot what it was called , but it
was used during installation. There was a very small hole in the front
or the side of the radio . The installer would find the weakest
station and adjust the radio untill the station was as loud and clear
as it could get.
Lastly you might have a bum heater motor or one thats going to fail.
try a ground strap from the heater motor to the firewall of the car.
Good Luck