irresponsible, unprofessional staff lost consignment and they don't communicate

my consignment has been with the couriers for 3 days now, they first delivered to wrong address over 300 km away. Now the consignment is untraceable and no one in this company takes responsibility. the consignment was in Boksburg head office. This is very unprofessional and unacceptable. the consignment is meant for business and the further the delay the greater the loss. If everybody want to use this company for expensive consignment they must think again.