Spoilt Food

The is the second experiencing such,where I buy a food item and find the quality unreasonable. The first time was Aunt Caroline rice which sent back to store and took my refund and today it's a loaf Albany bread which I purchased yesterday(04/10/17) expiry dated(08/10/17) but only to find when I came to the fourth slice,a dark greenish colour on the bread and that I put it away and returned to the store in question.