Bests & Worsts Reviews from Amazon

So bought this set of 4 bottled fruit flavored balsamic vinegar's and the first 2 of the 4 were fine. After opening the 3rd bottle (Peach) and then the 4th bottle (fig) which were both spoiled, I contacted the seller to let them know the situation to which their first email although worded awkwardly was going to refund my money. But then when asked them the process to return/exchange, they "corrected" themselves saying they do not accept returns on open bottles. Not sure how one is suppose to know something is spoiled without opening it but there goes my money because I poured it down the sink. Moral of the story, avoid sellers that don't accept returns when there are so many sellers that actually care about their customers satisfaction. Bad move Mandova.