[ewanm89]

My reply would probably be something like this, after checking it with a copyright lawyer:

Dear whomever it may concern at Zillow group,

As you do not have rights to the images are you authorised on behalf of the rights owners to issue DMCA take-down requests under title 17 of the United States Code under penalty of perjury?

Should this be the case I suggest you read Lenz v. Universal Music Corp., 801 F.3d 1126 (2015) in the 9th circuit which has just been refused certioari in the US Supreme Court (2017-06-19).

If you wish to continue this matter please submit a properly worded DMCA take down request.

Regards, ....

P.S. If you do continue this matter you obviously didn't read Lenz Vs. Universal and therefore I'll see you in court.