You should have talked with your friend and aks for an explication, i am sure she must have had some other reasons behind to boycot the stranger's product!
May be she did the right thing, you never know, you should be grateful to her!
Think positively!

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That’s ridiculous Eva. You just need the product not the guy. If the guy’s behavior is not good with you then complain to the agency; I’m sure they’ll talk to him or fire him. Don’t be hesitate.

You girls are so crazy; you create problem whenever there isn’t any. What kind of problem are you having with the guy? I hope not serious one. By the way the product is not only saleable by this salesperson there must be other places where that this product is sold. Buy it from there.

If you don’t like the guy who is selling the product then quit buying the product from him. There are other better products. Change the product brand. I hate unwanted problems so, I advise you to make a compromise and evade the problem. Save your friendship otherwise your friend will think that you are too egoistic and think of only your own good.

The decision is yours if you want to change a product on whatever grounds; you are free to do so. Neither your friend nor I can dictate your actions. Be confident for once and take a decision with which you will be satisfied. Don’t let anyone influence your decision.

It’s you who has to take the decision; whether you prefer the product or your friend. If you like your friend very much then you’ll have to listen to your friend and thereby stop using the product. If you care more for your beauty then renounce your friend.

I’m tired of these kinds of problems. You need to decide what is important for you the product or the seller. Of the product is important then continue taking the product and do not bother about what the guy is saying.