Johannesburg Office really need to go for Customer service and deliver parcels as expected

The managers even fail to live up to the standard and ensuring customer are serviced properly. The delivery never came to deliver the parcel to the address prescribed, yet he says he phoned me 3 times without succeeding but I never received any call nor any voicemail/miss call notification. they taking chances the sleep on the job and go back into the office with excuses, the worst part is that even their management cant even figure this out and ensure they track them and ensure they deliver as expected. maybe they go check on their girlfriends during work time and go back in the office with parcels undelivered. As a manager I should be alarmed by this and investigate but the current managers is just ok with this and carry on with life. what a disgrace and they will run this company to the ground. Top management should check on this.