Good question. I've tried calling Hasbro Australia three times about this, and never got an answer -- as in, I never even had anyone answering my calls! Each time I called, I was answered by a machine. The first 2 times, the machine diverted me to another machine which hung up on me. The third time, I had a machine which diverted me to another machine which diverted me to another machine and I just hung up.
Meanwhile, every time I've ever called Takara/TOMY, my call is always answered by a person, and my issue is always resolved ASAP. The last time I called TakTOM was when I received MP Rumble which came with two of the same side piledriver. TakaraTOMY sent me a spare set of both L-R piledrivers as well as an apology letter.