I have a Corporation and falling under the umbrella of the corporation I have a few domains.

Lets say the one of the domains under the umbrella is xyz.com Now I trademarked the corporation name but like most I did not trademark the domain names that fall under it. I just found that some one is using our domain name xyz.com with the .com in the title for their ad-words campaign. I found this due to a customer emailing me complaining that they did not receive a item only to find out they did not order it from us but the other company that is using our name.

I have looked on Google and they do have a complaint form for ad-words but it is a complaint form if the domain name is trademarked. does anyone know if there is anything I can do?

They are confusing our visitors as our visitors think they are part of us while they are not.

Using the name is one thing. but adding the .com to the end in my eyes is another.

Anyone have any advice on how to handle this?