Courier Guy an one way company - no help

I got an e-mail from Courier Guy reading "delivery failed attempt". I now try to find out what happened as the contact person was not phoned and there is a person whole day at home. Courier Guy has a one way communication system on whatsapp. The cut your conversation off and don't even care to talk to you. They left you with info and that is that. I was a very loyal customer of Courier Guy but from today I dislike you as I dislike Buffalo. Think you are the 2 worst delivery companies.