I don't know, Meryll seem like a decent brand so hopefully they're pretty honourable. Not a whole lot I can do until I get back to Brisbane where the receipt is.
The hole didn't get any bigger, so I'm assuming it was just the glue failing in that part.
Heaps of people had way more expensive boots that failed ($500+), and some people did just fine in $40 Kmart specials (although some of the blisters looked eye watering ).
My feet are probably smoother than when I left haha, definitely the most comfortable shoes I own.
I just ordered one of these, the estimated delivery is March 2017. they have them on sale for cybre Monday at 37% off so for the price it is just what I need. the sale has about 20 hours to go, if you need one. and free postage