Eco Plus Solutions Just asking Name & address & seding item with invoice Mercier Quebec

On April 2015, someone (Ethan) called our company and he asks my name and our company address.

Our company never heard about this company and he said just sending FREE HP catridge and confirming 

the address. 

And he will include his business card with item.

We received not HP product and weird package with already opened item and they include invoice with $425.23 amount.

They called to get the money but we said we will return it. They said return with our payment.

But we never order this item and the cartridge usaually less than $100 per one.

We did not to pay this bill and the return shipping fee has to be paid by that company (with sending not requested item).

Please stop this scam happening.