This a horrible courier service to work with

This a horrible courier service to work with. My parcel was delivered to me on a Saturday without my concern and obviously no one was at the premises. It was suppose to be re scheduled for delivery im here waiting 4 days later no communication nothing . I tried to speak to the courier company on WhatsApp no response and calls (waiting for long) to no avail. What happened to customer service ? This is BAD BAD service.