I had a very bad experience. I booked in May 2019 ...

I had a very bad experience. I booked in May 2019 for a allergy visit, they marked it for mid-September 2019. After the visit, the doctor prescribed me blood tests (in all, visit more than 250 euros) and told me to rebook a second visit after the analysis results. In the meantime I would have had to follow a diet without milk, coffee and a lot of other stuff that I usually ate. Back for the reservation, they told me that they have no more vacancies and the doctor took no interest in the matter.