Oil change

Dear people! I need your advice, your help. I was in service with my CR-V Bj 06/15 (AT, 1.6 Biturbo Diesel, 130t Km at the Tacho) on May 4th. For the first time (due to relocation) in a free workshop ua to change oil. I had checked the oil level before the service. The oil film ended exactly between the two markers on the oil rod and the oil color was at least not only black, but also golden. (Honda original oil) According to invoice, 4.7 liters of a brand unknown to me (Fuchs?) were poured in. Today (June 15th) I checked the oil level at a petrol station for interest (after several km in city traffic) and was very irritated. The oil film ended just once above the minimum marking, the oil pitch black. I am now very worried. I have to drive and want to drive my car for a long time and need a healthy engine. Is this to confront your assessment? Is there any other explanations? Thank you! LG S&D