Contaminated product.

Takealot are selling contaminated products. I purchased a tub of biosil diatemacious earth through a friend, which arrived from my friend in a sealed box, untampered with, but when I opened the box, I was horrified to discover that the product came with no seal on it. This definitely means that this product has been tampered with and must be classified as contaminated. This isn't the first time I have purchased a non returnable item from takealot that has been tampered with.