Product reviews problems, different items getting reviews mixed.

[csspecs]

So I make a product and it is really well liked because we are a high end sheet metal manufactorer.. Problem I'm getting is for some reason Ebay has linked my product with another that is made with significantly lesser quality control and thinner metal. So they are getting to benifit from my possitve reviews and I'm getting their negative reviews. A good comparison would be batteries, say I have a listing for brand name AA batteries and I'm getting the reviews from another seller that is selling the cheapest dollar store batteries and for some reason because they are both AA batteries they are sharing reviews.

Is there a way to fix or stop this?