Spoilt deli products

I purchased cold meats and other different types of ham from the food*****s market in hillfox around the 16/03 the use by date says 11/04 taken them out from the fridge this afternoon and everything is rotten! I am totally disgusted by this. This is not on we have kids eating those stuff during the day and if i had not taken note of it and they had eaten it then what? Stopp selling stale ****!!! Or put in the correct expiry dates