Case C-105/17: Judgment of the Court (Fifth Chamber) of 4 October 2018 (request for a preliminary ruling from the Administrativen sad — Varna — Bulgaria) — Komisia za zashtita na potrebitelite v Evelina Kamenova (Reference for a preliminary ruling — Consumer protection — Directive 2005/29/EC — Article 2(b) and (d) — Directive 2011/83/EU — Article 2(2) — Concepts of ‘trader’ and ‘commercial practices’)