We all complain about not getting answers when applying, but here is what I have observed (repeatedly).
When you apply to companies, you get an answer in 80% of the cases. It may be a negative answer, and with no useful data telling you why you were not selected, but it is an answer.
When you apply to recruiting companies, you rarely get an answer. The reason for that may be that they may not have the role exclusively (or not at all). Don't just assume that they're bad, heartless, emotionless people; they may just not be authorized to reject you at all!