Are you aware how stupid this is, what you just said? Get yourself together. Even if you do have a proof how much you paid design you can't put negative feedback on third person, again just because you said so, why should anyone believe you here? Negative feedback you could put on that "design" firm if any of this is true
I've sent you a PM answering your question. He himself has no interest in arguing with me as we are both personally aware of what he has done.
Also your logic is horribly distorted. I posted my reply below, if you'd like to reply with more off-topic posts I will not respond to them further, my PM is open to continue discussion regarding this as I've stated many times.
Let me paint this in a very simple and easy to understand manner. Let's say I run a shop that sells power tools and we hire a security firm to manage our security. A robber bribes our security guards with free doughnuts to leave his post. Said robber then goes and steals the design for an unreleased power tool and then uses that design to create his own. Did the robber not act unethically, is this only the security guards fault?