Bests & Worsts Reviews from Amazon

This is the third product review that I have submitted. The company contacted me and ask me to submit only positive reviews about this product. This product is like water, no substance and it certainly does nothing to help with anything. After I posted the second negative review on this product, the company again ask me to only post positives. I truly feel that there is something wrong with that. I use Amazon a lot and I rely on these reviews.