Here is an easy fix which just takes 2 minutes:
Please turn the Koshi or Zaphir chime upside down while holding the little bamboo/black plate where the cord is attached.
You can now see exactly where it is tangled.
Now shake it a gently while holding the plate and pulling and pushing the cord a little bit.
The cord will hang free now and the Koshis or Zaphirs will chime beautifully.
