Oh boy.....I see a potential problem here!!1

When you connected the charger to the battery under the hood, be specific, where and what did you connect the cables to?

 

x2 - and it does get frustrating at times when questions are not answered or suggestions are not followed up on.

Poking around under the hood, hooking up a charger to what one thinks is a battery can result in some serious damage.

I'd suggest you take it into a shop, dealer or shop you can trust, rather than try and trouble shoot it further yourself over the internet.

I'm out of this one. Best of luck with it.