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Help Samsung Galaxy A3 LOCK screen randomly coming on and home button not working

Hi all, I'm completely new to the forum, anyway I have a Samsung Galaxy A3 which I have had for around a month, yesterday I noticed the home button was not working and I was unable to lock my device, google now would appear, I had to wait for the device to auto lock where on the lock screen the buttons would work, ever since yesterday night my screen would come on and then go off for no reason, I wasn't receiving messages or notifications, it is still doing it now when it's locked, my lock button is currently being strange, I press it and the screen can come on and go off, I honestly don't know what has happened to my phone but I tried a factory reset and that didn't work.

ALSO, My home button seems to work when I put it in recovery mode (lock button + Volume button + home button) I don't know what else I can do, nothing has seemed to worked
 
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