SPF 50 Sebamed Sunscreen Provides No Sun Protection and Causes Skin Burns

We bought Sebamed SPF 50 sunscreen just a week ago from the store. Today, during our vacation, 6 people experienced burning sensations after using it. I called the store, expecting feedback on customers experiencing allergic reactions due to the sold product, to meet with the store manager. However, no one returned my call. We purchased the product because it was on sale. I absolutely do not recommend buying products from anywhere other than a pharmacy. My children, aged 3 and 5, are in terrible condition, as are we. We will await a meeting with the store. If necessary, we will file a legal complaint. One of the products was not even opened from its packaging.