I assume you're in the EU. The sauce guys are in the EU as well (at the time of purchase) so that makes it an easy case to verify with your EU consumer rights.
You have a minimum warranty of 2 years, with the caveat that after the first 6 months have passed you have to prove the article was defective when you received it, before that time it would be the seller having to prove the item was without flaws (which is almost impossible to do).
If during those first 6 months the device stops working (or develops major flaws) the seller has to take action.
Unfortunately for you it's the sellers choice if they want to repair, exchange or refund the item, not yours.
They have no obligation to refund.
That said I'd expect more from people catering to high end buyers, customer service is a part of high end and the bare legal minimum isn't really anything special, is it.
Edit: just saw you live in Latin America so I don't know what your rights are.
Written all that stuff for nothing

... whelp, somebody might read it who didn't know so I'll leave it up.