What is going on with your product

The last 3 cases of Castle Lite 500ml cans we bought have been defected. The blue part that opens the can, breaks off almost everytime we open a beer. Then we sit with a can we cannot open. I then have to use a knife or something to open the can which is awful as the beer then sprays out. This happened to basically every beer in the 3 cases. I've never had this happen with any can I've ever bought. What is going on? Check the quality on your products.