keys on my MacBook Pro 2012 don't work properly!

I've asked here before about same issue and that was my post:>>>>>>

How could I fix my macbook pro keyboard? I have problem with some keys on my keyboard that doesn't work properly,After many tries I found that some keys together click another key like:`+z+=bringing up the volume level

`+x+c=( § )

`+x+c+v=( [ )

`+x+c+v+b=( ] )

`+x+c+v+b+n=( = )

`+x+c+v+b+n+,=( ⬅ )

`+x+c+v+b+n+,+.=( ⬆ ) anybody has any idea about what the problem and how to fix it??

"<<<<<<<

after I did pop the bottom cover I realized that the two holders of the battery"sorry for my bad English" are broken as u could see in the image:

I thought then that the problem is the battery as someone replied to my first post,then I took out the battery and put the laptop on charger then I turned on the laptop without battery but the Keyes problem didn't solve!!!

what do you think then is the problem?the battery coz the holders were broken ?or the keyboard its self coz it didn't work when I took off the battery?

thanks a million in advance.