basicallly i like to solve andriod mobile and windows  computer problems mineself and i always enjoy it
but this problem is not solving

ANDRIOD MOBILE PROBLEM PLEASE HELP ANY
MINE IS 4.1.2  OR 4.4.4 ANDRIOD

I installed musicly.ly application and then when i choose import contacts from facebook mine phone contacts corrupted

I Booted in recovery mode cleared cache and delivk cache also

then i cleared data and cache of contacts storage - 4.1.2-I8552XXANH3
and also cleared data and cache of contacts - 4.1.2-I8552XXANB1

NOTHING happened .
when i open contacts it tells after few secs - 'Unfortunately , Contacts has stopped"

also i get this error
Unfortunately The Process android.process.acore Has Stopped

I FOUND SOLUTION TO THIS AND DISABLE contacts storage - 4.1.2 SO NOW THIS ERROR DONT COMES

ANY THIRD PARTY APP FOR SAMSUNG GT-I8552 FOR CONTACTS AND CONTACTS STORAGE
As both are listed as manufacture applications it cant be uninstalled
also i downloaded SecContacts.apk and SecContactsProvider.apk to replace files for contacts but it is not installing as it does not uninstall previous versions
what to do any idea

I REINSTALLED ORIGINAL 4.1.2 JELLYBEAN OPERATING SYSTEM
I INSTALLED NON OFFICAL 4.4.4 KITKAT ALSO BUT NOTHING IS HAPPENING TO CONTACTS
I cant save any contacts . even i whatsapp i get error - you may not have a proper app for viewing this content.
yes this error goes if i enable contacts storage but then evert 30 secs popup comes Unfortunately The Process android.process.acore Has Stopped

where t get original files i have I8552XXANJ1_I8552ODDANG1_I8552DDANG1_HOME.tar  (I8552XXANJ1_I8552ODDANG1_INU_2) file downloaded from samsung site this is original firmware

2 SOLUTIONS I HAVE ONE IS TO DO FACTORY RESET WHICH I DONT WANT TO DO
OTHER IS TO INSTALL KITKAT 4.4.4 UNOFFICAL VERSION WITH FORMAT OPTION ON THAT I ALSO DONT WANT TO DO

AS I HAVE too many applications installed


any solution
i have system.img.ext4 (more than 1 GB)  from I8552XXANJ1 but i cant any application which can read or extract data from ext4
i think this system.img.ext4 will be having apks that i want


ANY OTHER WAY TO DUMP VFC CONTACTS DIRECTLY IN ROOT FROM WHERE CONTACTS ARE READ BY MOBILE
I HAVE PHONE ROOTED ALREADY

I CANT SAVE ANY CONTACTS NEITHER I HAVE ANY CONTACTS SAVED IN PHONE DIALER BECAUSE I RESET DATA
YES I HAVE 15 DAYS OLD BACKUP OF CONTACTS IN VCF FILE