Rotten eggs

Not long ago I bought the pick n pay all grain white eggs 18 tray at the Center point branch, there were 3 eggs rotten, one was black and I had just put new oil in pan, I was disgusted and threw egg down drain, had to wash out pan AGAIN and put new oil in AGAIN. The day before yesterday I bought a 6 pack of these eggs again as I prefer these white eggs over the normal eggs, the 4th egg brownish in the pan of new oil! I was disgusted and I'm now just put off eggs! I took a picture of the egg in pan before throwing it away and have decided now that enough is enough with the rotten eggs!