That’s exactly right JnEIt might depend on how you "word" the complaint, or enquiry.
In general, a reasonable, and well described, complaint can get good results, and would not be negative to your application.
@mariap, I was in the exact same dilemma few weeks ago. But there was no option so I gave it shot.
You asked me how did I get response to the complaint? I strongly believe it all depends on how you word it.