Tefal Stainless Steel Knife Rusted After Only Three Months

I bought a Tefal stainless steel kitchen knife about 3–4 months ago for my trousseau and I have been using it regularly for the last two months. Although it is a stainless steel product, the entire steel part of the knife has started to rust and there are visible rust spots on the surface. I am very disappointed that a product I chose and trusted for long‑term use has rusted in such a short time. For this reason, I request that this knife be replaced with a new one or that a refund be provided.