Unhappy [Q] I have a big problem

hello good forgive my ignorance but I made a good mess ...
I explain I have asked two Chinese replicas phone samsung galaxy s5

I miss root and install titanium backup to free up space and I started to uninstall applications now manufactures and always puts me an error that processo com.android.phone has stopped and will not let me use the phone.
try to use the backup rom flash with sp tools but I'm not able to connect the phone the program does not detect it ... try installing the sd and says installation aborted start can help me?

mtk tools the program gives me this droid

Hardware: MT6582 (Qualcomm is Fake!)
Model: SM-G900F
Build number: JDQ39.G9008VZCUBMHJ
Build date UTC: 20140530-055305
Android v: 4.4.2
Baseband v: MOLY.WR8.W1315.MD.WG.MP.V15, 2013/11/21 22:19
Kernel v: 3.4.5-447903 (se.infra @ SEP-92) (gcc version 4.6.x-google 20120106 (prerelease) (GCC)) # 1 SMP Fri May 30 2014 13:47:26 CT
Uboot build v: -----
LCD Driver IC: 1-otm8018b_dsi_vdo_lcm_drv