Sorry to hear about your Null Audio Cable, JTV. I've had my Lune cable for just over a year now and it's held up great. No issues except for the fact that it tangles quite easily. I do commute with them everyday now so they'll really be put to the test.
This is the problem with buying something overseas. We can't easily get support and warranty work done. I much prefer to buy locally, or at least in the United States.