Expired products sold at PEP

I bought a chocolate at Pep store on the 13.04.18. When I got home my is n the opened and took a piece ,while I browsing through the pack only to find that its expired. This is totally unacceptable. This means that you do not check your stock on a daily basis and this is a health hazard for customers. I am deeply disappointed to both Pep and the Mondelez SA. This is wrong