Phone [Q] MTK6577

Hi everyone,
I post this message because I have a problem with the phone below.

1:1 original i8190 Mini s3 512MB RAM 4GB ROM MTK6577 dual core 1.2GB Single card Single stay Mobile phone 4-inch 3G smartphones

Firstly. I managed to install a recovery systeme with MTKdroidtools and did a backup but I had a problem with the phone, I found that the phone was not stable. So I decided to install a new rom from Needrom web site and use Flastools for.

Now my phone doesn't turn on but still recognized by Flastools.
I tried to contact the seller to ask him if he could give me the original Rom but he doesn't want.

So is it someone can help me and explain me how I can do if something is possible from my update or try to create a scatter file with it or give me the good Rom.

Thank in advance.