I changed two controllers/transformers earlier for a friend. I was there to do six. I connected the first two and well, they blew up .
You say this like a lot of the stuff you buy from Aussie shelves isn't bought in bulk from the exact same suppliers as Aliexpress. You just need to do the work to find reputable stores. If it's the cheapest price available, and the store has a bunch of random numbers in its name, pawbably give it a miss.