Hello everybody

I have my old meizu m5 note, i thought i might put a new rom for it, i did root it and wanted to unroot the device back
So i wanted to install the Super-su for unrooting, it faild for installation 5 times and asked to restart the device
and thats what i did, but after that the device freezed at the booting mode and never open again!!

Any help? advice? steps to fix this issue?

Thank you so much