Frankly, I'm amazed this hasn't been publicly resolved satisfactorily yet.
The reply left by the MANAGER of this company over at KvR is nothing short of disgraceful.
To outwardly alienate 25,000+ current and potential (and serious) customers is a business move I hope you'll regret.
I certainly WON'T be buying any of your products as I find the tactics employed by your staff of going in under an assumed name (nothing wrong with that per se) and reviewing competitors products (again nothing wrong with that per se) and consistently giving those products flamed reviews, pointing the reader instead towards your own products: then reviewing your own products as if you're a customer, even stating that since you PURCHASED this product, etc etc - well, in my opinion that makes your staff member a liar and a cheat.
And the fact that the manager of your company went yesterday to KvR to post a reply which effectively states "we couldn't care less and who do you lot think you are anyway?" shows a complete disregard on your behalf towards your existing (there are many Arturia users on KvR's board) and potential customers.
I don't know if you're aware of the fact that people are REMOVING Arturia products from their machines because of your apparently off-hand attitude.
This is a tough market place and I'm pleased for you that your company is doing so well that you can afford to lose so many real and potential customers, not to mention the word of mouth damage that is even now being done to your company.
There are notices about this behaviour on many other boards also, so you don't need to worry about only alienating the thriving INTERNATIONAL community that is KvR, but also most musicians who visit many others sites.
They say no publicity is bad publicity, but in your case, I feel it may have more effect on your future sales than you might expect.
Time will tell.
When I read in the news in a couple of months time that Arturia have gone out of business I'll know it's because you were arrogant, dishonest and couldn't care less about the people who paid your wages.
I feel the best way for you to remedy this is to apologise properly and believably to the world-wide musicians that you have now alienated.
Your employee has been dishonest and libelous and it's time to admit fault instead of trying to shift blame onto the other company.
That company DID NOT review your products (under a psuedonym) in a negative way, then point people towards their own product (as if they were a bonafide regular user who has BOUGHT the product).
If you really can't see what's wrong with this, then, IMO, you deserve all the flak you get.
Good luck to you.
You're going to need it.