Since he owns the trademark and (according to his other answers) the business doesn't seem to be legitimate, or even located in the address, that's what I would do as well.
Anyway, as I wrote in another comment the person behind this is either a normal person using his home address or someone working for another company located at that address.
This means that Google has assigned the ownership to him already. I couldn't find any way for requesting the ownership to the entry, but only a "ask the owner access to this entry" page.
Also, a business might exists in that address, but it's certainly not called like my blog.
Pretty sure that's the link your looking for if you want owner's access to the entry.
It probably is your fastest and best path forward.
I thought google didn't really have any customer support or any humans involved in most things. It was all automated systems built by software engineers for the most part.