In the absence of any term or condition a court would look upon either caselaw or what is reasonable.
If this were a 12 month warranty then the goods are warranted for 12 months to be free of defects. In order to warrant the goods for 12 months, if they break after say, 3 months, the replacement item would carry 9 months warranty, to complete the warrant for the 12 months.
In this particular case the effect is very similar. There is a 14 day return policy and you have availed of that. If it applied to replacement goods, (ignoring the extra money you paid) you could keep taking the item back every 14 days and taking out a replacement ad infinitum and have a new watch for life.
You have three sales invoices but regardless of what they say, they are actually receipts for the money. This is not a case that I would go to court, if you were minded to go that far, with any hope of success. I’m sorry, I wish I could give you a more favourable answer.
Can I clarify anything for you?
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