Effects Automatically Goes Off !!

Try Settings - General - Accessibility - Reduce Motion - toggle OFF and ON and see if one of them is to your liking

I think i get what you are saying - the button goes from OFF to ON automatically

That is unusual - usually it is a volitional act by the end user

Turn if ON - then force restart the phone

Hold the sleep/wake and home buttons down together till you see  logo - then release and allow normal boot up

See if that makes is "stick"

Backup the device to iTunes - Restore as NEW (not from backup) using iTunes - see if problem resolves - if yes - restore backup

Please make a Genius appointment at an Apple Store, or go to another authorized service provider.

Gurpreet - you have to make an appointment and take the phone with you to the appointment