C***** milk unhygienic

This is the 3rd 2L milk that’s I’ve bought that the lid is not secure. It comes off completely. In other words it’s not tamper proof. Anyone can open the milk and close it again and we the consumer, are none the wiser. We spend the extra money for the quality we’ve enjoyed from c*****. But now we can’t even be sure no one had tampered with our milk. This is unacceptable. And it’s usless calling c***** to inform them of this as it gets no response.