Rotten food sold to me

This morning I had sent my nephew to go and get me some vegetables at Spar in Austerville Wentworth. St George's Spar to be exact. On my list I told him to get me mushrooms of which he did. I was very disgusted when I saw what they were looking like in the package. Those mushrooms are rotten and are discolored , mushrooms are white but the ones that Spar sold me were dark brown almost turning black. What kind of store would sell something that is rotten to the public? Is that customer satisfaction? I will never be purchasing from spar any longer and I will definitely be telling people not to be buying at your store . I do have pictures of this if evidence is needed.