TWRP mounting nothing ,no os intalled help anyway pleasee

[AC Question]

HELP!, in TWRP ,nothing can be mounted , mounting ption doesnt check anything except sdcard, no os installed , system is 0MB, tried to change into CWM with fastboot but TWRP doesnt gets replaced with any of other recovery , ive also tried to change file system , nothing works , any task shows: cant mount /data ,/cache, /system .. ilm going mad and even service centre cant fix this problem , ive lot of hopes from you guys , , my bphone is android one , sprout 4