Video playback is slow with sluggish voice on all apps. Samsung Note 3 Neo!

[Android Central Question]

I've a Samsung Note 3 Neo. I have been using this device since 2015 without any issue but today suddenly all apps, including Chrome and Youtube, started playing videos in slow mo and with sluggish voice. I have rest the device, formatted it, cleared cache, activated Abe deactivated Awesome player from developers option and hard reset the device as well but nothing is working.

Please Help!