The product has zero resemblance to what's advertised. The build quality is exactly what you'd expect from a €3 dropshipping item sourced from Alibaba. The branding, the website, the price point, all designed to create an impression that has nothing to do with what you actually receive.
This is not a "the product wasn't for me" situation. This is a fundamental mismatch between marketing and reality, and selling plexiglass lenses as sunglasses without disclosing that they offer no UV protection i