The right to lodge a data protection complaint: OK, but then what?
DPAs are independent authorities entrusted with the consistent application of the GDPR, and are obliged to facilitate the submission of complaints. However, according to this paper, current practices related to this obligation are lacking in clarity, and there is a need for DPAs to provide more information to data subjects about their rights under the GDPR.
https://www.ivir.nl/publicaties/download/GDPR-Complaint-study-1.pdf