Well, try to understand the point of view of the Vendor.
You bought 1 bottle of each of those liquids (or more, but that's not important), The vendor bought a stock of those, he paid already and has to sell them.
Now you did not like X or Y liquid, each to his own, that's your taste. But the vendor's website is here for one and only one purpose: to sell.
it is designed and uses media, text etc... in order to sell.
So why on earth would the vendor publish negative reviews about what he sells, on the media that is there for the sole purpose of selling?
Now I take it you did not like the juices, which is why you posted a negative review. But others might like it, and if they read your review, maybe they wouldn't buy it and they couldn't then enjoy it.
Of course if the juice had some sort of health hazards and whatnot, the vendor would be bound to do something about it (at least inform the customers, at most remove it from the virtual shelves)
A positive or a neutral review will help the sale in one way or another, incite the customer, or at least inform him/her
A negative review on the website will slow the sales.
if the juice is widely not appreciated, then the vendor will notice it and not stock it anymore. But should he discard his entire stock or jeopardize significant profit/revenue because you, out of all people, you did not like this juice?
I'm not trying to bash here, but I wanted to give the vendor's point of view, people are not all lying and tricking you into giving them your money.
----------------------------------------------
now, a good vendor will read negative reviews and take them into account.
we all are humans and we all are different. Of course many people in business do shortcuts and don't really care about their customers. But just as many business owners do care.