Rotten Sweet Potatoes

My husband on Monday 04/01/2016 around 14:00pm bought some fruits and sweet potatoes at food *****s market vanderbijlpark. On Tuesday as I was making supper, I took some sweet potatoes to peel them, only to find out that they had mould outside on it and they were rotten inside. This really angered me as I expect quality fresh vegetables from such a store. we spent R46.99 on 4sweet potatoes, of which all of them are rotten. I still have the receipt with me to proof it, I threw the sweet potatoes away as I cant keep rotten things. Food *****s used to be a quality store, selling fresh fruit and vegetables now its going down the drain due to them selling us /keeping things that are rotten on the shelves.