Gionee e7 mini doesn't starting up

Hi guys, please help me with this kind of problem. My phone is not starting/loading even to loading screen is not starting up (sorry, im beginner. I don't know what it is). Maybe I've bricked my phone :(. It all started when I root this and install recovery_gnE7.img and my IMEI 1 & 2 both gone. Then, I grant also some apps. Then, I unroot it and uninstall the superuser and framaroot. Then changed to other framaroot (compatible framaroot based on the blogspot). but rooting was not successful. So I tried to shut it down. Then my cellphone starts to encounter this problem. I also tried to hold the power 10 sec upto 25 sec. but didn't work. It keeps on rebooting not displaying the logo and turning off then rebooting and so on.

Please help me guys on this.. :( Your help/suggestion will be much appreciated.