UPS in South Africa extremely poor service

I received a parcel for my business and it has been with UPS for a week. Apparently they cannot get hold of me because my phone goes to voicemail. No messages were left and no email was send. Finally got hold of the agents but now it takes 3 days (yes THREE DAYS) to create a customs invoice. It takes longer to generate an invoice than to ship the parcel from the USA to SA, go figure, don't use UPS if unless you absolutely have to.