After working so hard i found this procedure to unbrick y300-0010 model i tested it on my own cellphone works all fine. it works if your phone is stuck on logo after flashing custom firmware there is no procedure that i found so i try it my self first need to install trwp recovery one method is here 
second method that i use and tested myself isafter this boot into trwp recovery by pressing vol up and power in some model vol down and power make sure u pull the battery our at least 10 sec then goto recovery
download this rom
put the file into root of sd card goto recovery
flash your device selecting wipe factory and wipe dalv etc
flash rom its in other language first need to select from sd card
sweep to flash wait
now sigulente
check the option etoy de acuerdo > sigulente
now select option first option it select itself if u like click it
second option select by your choice in this stock animation sony animation and nexus animation select any one you like i select stock coz its huawei i like it that way
again sigulente means next
now select extra aplollo music es file manager flash player and reboot manager select the apps you like else sigulente
then more apps select as you like and sigulente
it calculate the total again sigulente
now its flashing make sure ure batery is charge let it done after that finish
now it go back to trwp wipe the cache and delvik then reboot system now your on your 4.4 firmware
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