Read the PCOA forum, it has a couple of people talk about the problem. Essentially it's a bit of a weak link in the handle assembly which is exacerbated by using the child locks.
Order the parts you need from courtesyparts.com and do it yourself or take it to a mechanic to fix with the parts you supply.
Nissan's disgusting price of $280 for the handle and then another $60 to have it painted followed by the repair fee of around $150 is easily matched by shipping from the US for $28 and then doing it yourself. You can even order them in the same colour, or chrome, etc. If you can't find the post on the pcoa forum, let me know and I'll point you in the right direction. I ended up ordering both sides in US silver which is really really slightly different to AU silver and they ended up being around $50 each with shipping.