If you have rest of the cable, it should be an easy fix. Any electronic repair shop/phone repair shop will be able to do this. If you have a soldering iron, you can do this yourself.
Im not sure availability of replacement cables in Sri Lanka, but you can simply buy a good quality micro usb cable and use it.
disassembling is not too hard
looks like the cable is directly soldered to the pcb, so easy to re-solder the cable.