Sebamed Anti-Hair Loss Shampoo Caused Allergic Reaction and Skin Redness

I bought Sebamed Anti-Hair Loss Shampoo at a very high price. When I first used the shampoo, the areas it touched turned as red as tomatoes – my face, my chin, even where the shampoo foam had passed became bright red. I thought maybe it happened because I used it for the first time, told myself that tolerance would develop, and used it a second time. This time it got even worse, as if there is acid inside the shampoo. I wrote to customer service but received no response. It's astonishing how indifferent they can be. Similarly, this summer, I bought Sebamed SPF 50 sunscreen at a very high price, and it turned out to be horribly bad too. The areas where I applied the cream turned as red as if I had smeared them with tomato sauce. Sebamed again? Never! I have no hope for feedback, but maybe by writing this, I can prevent someone else from experiencing the same thing.