Bruised Lee posted some useful info in the other thread about TRU's online order system. And it sounds like many other PO system: Order comes in, gets fulfilled by the store which is of your choosing or allocated by the system depending on the postage address and stock availability.

Who knows why they're still being sold in store but you have an official response which is its a price error.

But judging by your posts I don't think any reasonable explanation short of giving you your transformer will suffice.