My Bluetooth does not work the trunk button on my key and inside the car won't work I have a battery issue from leaving my lights on a couple of times and now the battery when it works now that I pay out of pocket for another battery and the car has a whistling sound when you turn the car on and when you accelerate and use the brakes on it and I just bought this car July 21st 2019 what should I do please give me advice something someone help

One more problem I have with this car is the blue tooth system cutting out unexpectedly. I like to listen to Pandora on my phone through it and sometimes it will drop connection to my phone and won't reconnect even though my phone sees my car. I can't connect it again until I cut the car off and restart it. Don't buy this car. It is not like other older Nissans. They make these cheap and poorly.