Re: Helllllllllp "speaker"
You've turned on the dreaded "talkback" mode.
The only way I know of to get rid of it is to go to Settings > Application Manager, and scroll right to the "All" tab. Scroll down and find "Talkback." Tap on it, and select force stop. THEN tap on disable so it never runs again.
If you're having trouble navigating to things, you may need to use two-fingers to scroll, instead of the normal one. And you may need to double-tap to activate buttons, instead of a normal single tap.