I got the solution from reddit, I followed it after watching some videos about wire splicing
# Cut the cable in half at the break.
# Stripped the fabric outside of the cable, 1.5 cm on both sides.
# Striped the inner black insulating cable, about 1cm
# Seperated wires, one green, one copper NOTE: remember the green ones!
# Slightly untwist the ends of the metal wires
# Using a lighter, light the tips of the exposed wire NOTE: first time it will catch on fire and run up the cable, blow it out before it reaches the black insulated part, green colour will fade!
# Repeat 6 about 3-4 times. Alternate wires. STOP if you see small balls forming at the end of the wire. Never hold the fire on it for more than 2 seconds
# Combine green and copper wires back into two neat bunches
# Twist both ends with the right colours of the other side side
# TIGHLTY wrap with seperate wires once with electrical/insulating tape
# Test headset
# Wrap another layer of electrical/insulating tape around the two newly connected wires, combining them
# Re-assemble headset
# Hope this can be of help to people