When people don't have the courtesy to reply to messages

Indeed, technology has made communication a lot easier and enabled delivery at any point in time 24/7. Messages could be sent through various ways: SMS or short message service, emails, messengers and many more.  However, despite the availability of said services, there are some who lacks the courtesy of being responsive in replying. I don't have load, my battery died, I did not get
your message and some more excuses people often use.  

While some reasons are  valid enough for me to believe, oftentimes, I won't buy it.  Why is it possible for a person to find ways to send several messages when they are in need yet they cannot spare a 1 peso worth of load to reply a single message?  How is it possible not to receive any of the 4 messages sent in a row?  If no load is the reason for not replying, then why is it that even messages sent through facebook that showed it was "read" still remain unresponded? What could be more ridiculous when people post, like, upload and share things on social network yet they obviously ignore an important message?  That kind of attitude only defines the real character of a person and a clear reflection of what is really inside the heart.  Denying to have received a message is likewise a simple act of lying that put to test the real essence of faith.  Respect begets respect and don't expect to get when you don't know how to give.  In the end, who will have the burden of guilt?  Just saying.