Asalam o alaikum

dear members
I need your help
mn ne ne windows 8.1 k 7 Linux as a dual boot install ki but Linux k bad windows ka bootloader corrupt ho gya and mere 3 separate partions ek hi partion mn merge ho gai or phr sirf ek partion ka data new merged partion mn show ho rha hai
kisi ko idea hai k ye data ya partions kese separate ho gi

Linux mn new partion /dev/sda4p1 /dev/sda4p2 /dev/sda4p3 /dev/sda4p4 is trha show ho rhi hain or unfortunately sub partition p1 p2 p3 mount b ni horhi

agr kisi ko solution pata hai to please guide me

otherwise mera 600GB data waste ho jaega