Wow, lots of replies on various sides. The links to money saving expert are really useful.
The key point here is:
"Fit for purpose AND last a reasonable length of time"
If a pair of shoes fails after what is less than 4 months of use, that is not really a reasonable length of time. Considering the previous pair lasted over 2 years, and the pair before 18 months.
I currently don't have a camera on my phone so can't upload photos, but will do when I have a chance.
This isn't about accepting the goods or the standard return within 28 days stuff that we all get for unused products. This is a product that is not lasting a reasonable length of time. The reason I had to wear them to the store was simple: it was that or bare foot.
Julia
Couple of things here Julia.
You walked into the shop wearing said shoes, so it's difficult accepting that they're not "fit for purpose" as you must have walked there in them.
Length of time is not really relevant if something fails.
You have had them for 4 months, if you walk 10 miles a day that's roughly 1200 miles they could have covered.
You could have walked in the sea every day, had been "skiing" off the back of a motorbike, been skateboarding or climbing, all these activities will cause premature or odd wear on the shoe.
Likewise you could have just walked once round the block in them.
Thing is the shop assistant isn't going to make that call that's why the shoes need to be sent off.
Nothing wrong with you thinking they might be faulty, without seeing the shoe it's impossible to say.
There is also nothing wrong with the store wanting to return them to get them checked out IMO.
Hopefully you won't mind a bit of friendly advice here.
But if you only have 1 pair of shoes then it might be worth waiting up on buying the new lightweight kit for your upcoming trip, or even postponing the trip till you've caught up financially speaking.
It's tough getting by with only 1 pair of shoes.