Bad service

I am very disappointed with the service I received at Postnet Rondebosch in Cape Town, Tony the name of the person who assisted me today at 14:30, he opened my envelope with confidential document claiming that it is postnet's policy to do that,to see what is inside, I let him open the envelope as it was my first time to be sent there, he kept on telling me same thing over and over again about if the documents are lost , postnet is not liable but he showed me there that he can open the envelope, only to find out about the person who sent me that he was not suppose to do that as the documents in the envelope contains people's personal details.

This is what I hate about people who gives services, instead of helping you as the client to understand the importance of their business they make a person look stupid by doing things they not supposed to especially if it is your first time, now tell me how do I recommend your services to other clients if people like Tony can keep a person for 30 minutes, interrogating them, I almost told him to return the envelope as he seems to have a problem of what is inside and still asks me to pay R5 extra for insurance how can he contradict the business because earlier he told me postnet is not liable should anything happen to those documents.

I am so disgusted and disappointed at the same time.