Radio/tape Cd Player problems of the 2019 Nissan Sentra

The radio will randomly come on for a second when the car is off. I have went out to get something out of the trunk & this has happened & I have also went out to leave & when I walk outside the radio in the car is playing when the car has not been driven since the prior day. I am concerned about this issue draining the car battery. This is random & has happened more than a dozen times.

I purchased my vehicle 4/2019 and taken it back to the dealer at least 4 times for other problems and they tell me there's nothing going on when they check it. I am now experiencing a new problem and I took it back to the dealer concerning the radio coming on and off when the car wasn't in use. When I would get into the car it wouldn't start and I would have to get it boosted to start. The battery keeps running down. I was told by the dealer that there has been other reports and that they are being told not to fix problem until Nissan further investigate the problem. They claimed to dismantled the radio to avoid the battery from running down but its still doing the same thing. Also it was stated I could to continue driving until they call it in for repairs and stated that they couldn't give me a time frame when it will be fixed. I wasn't offered a loaner and when I asked I was told they didn't have one available. I took it in 1/30/20 and picked it up 1/31/20.

The second day after purchasing vehicle the radio would come on and go off even when car nor radio was on. It happens a lot. Went out to garage one night and radio was playing. Don't know how long it was on. Happens while driving on highway and streets also. Came out of work radio was playing in parked car. I'm afraid battery will run down or worse electrical problem causing other safety issues when driving car. Dealer had had 22 days with no answer to repair. Just bought oct. 31st.