Disgustingly poor service at Engen filling station

We are a party of 6 adults and 2 children. We filled three empty cars at Engen and all paid to use the ablution facilities (no warning was provided beforehand that the facilities were unusable. The 3 ladies toilets each were blocked with stools and toiletpaper, unable to flush and all 3 cubicles were broken down. We asked for the key for disabled person and the staff said that no-one there had a key. We then attempted the men's, however the toilet was so disgustingly dirty, filled with bad smells and more stool with unspeakable bad Hygiene which made it impossible to breath and we all nearly started vomiting. We left and asked Leeuw for a refund and he said that he is sorry but we will have to wait for Stefan the owner. We travelled 500km and still had ****m to go. We were not going to wait. We used to regard Engen as good service with excellent facilities. However overnight our vision regarding Engen has changed and will unlikely ever want to even think twice before stopping there again and rather find alternative stations and the same with recommendations.