The unpaid break is also the same in the general work law (Estatuto de los Trabajadores) but professions get extra laws that apply to them (convenio del metal, convenio de farmacia, etc) where they can go better than the general law, and most ‘convenio’ pay for that 15 min break. Lunch time? Never paid unless you agree directly with your company, but some nice companies (I don’t have numbers but in my experience in the IT industry may be around 30% of them) give you 10-12€ a day to help pay your lunch or they have cafeterias where you eat for 4 or 5€.
Were they erased when the investigation started or was it done time before?