I had battery changed, by people that i thought new how to do it. door locks, locks and unlocks when driving, Radio turns on and off at same time. What happened? How do i fix it?

Check the battery connections are good, that the terminal ends aren't frayed or loose. From your description your car may be losing electrical power intermittently while driving. If you can't solve this yourself get it to a reliable shop or garage and ask them to check over the battery connections.