Suing a real estate company

[Bienes Raices]

I don't want to get into the details here, but I'm owed a little less than $1000 due a mistake made at closing, on my personal residence. There is a possibility that one way of getting the money back is to sue the seller's real estate co. because they violated my RESPA rights.

This is a large real estate company in the area, so I'm wondering if I'll be put onto some kind of blacklist by them if I sue them? I plan to buy more foreclosures in the future, so I don't want to shoot myself in the foot and have them refuse to deal to me in the future, just to get the $1000 back.

There are other possible ways of getting the money back that I'm exploring, but this could be a last ditch option.