GT-S5253 USB not working

[meisam]

Dear supporters;
I have Samsung S5253,i needed to remove userlock so that i flashed it but in the middle of flash process suddenly phone went OFF.I did boot repair and it's done ok,phone goes to bootloader mode but when i connect it via usb cable nothing is detected in the pc.Below is all i did till now:

1.Did jtag with riff and done ok.
2.Checkd phone hardware but no fault is there coz it's new one and all hardware is ok.
3.Tried with other PC and no change.
4.Tried boot reapir with Z3x it's done but still no change.
5.Tried with samsung downloaders and no help.

Now how can i revive tis phone?shall i pay the price to the customer?Please help.