Delayed delivery

This is the worst courier service company EVER!! I have been waiting for my parcel to be delivered for 5 days now and when I track it on their site it shows that I was unavailable yet I work from home and never received even one call. Apparently there were 3 attempted deliveries, I'm assuming I'm yet to receive more excuses. Their agents keep on telling me the same story that the parcel will be delivered the following day and that I will get a call from a driver yet no one has called.