Very unhappy UPS customer

I own a small retail business and have no choice but to make use of UPS to get orders in from the UK, as many of my suppliers use them. I have now been waiting for an order, which was sent Express and has been sitting in Kempton Park since the 26th June. Having spent many hours of my time calling them and trying to understand what the issue is, I still do not have my parcel. I have paid the duties as soon as I received the invoice and then paid the government department to inspect my parcel - another R345 ... ridiculous! - and still nothing. The website is pathetic and only tells me that the parcel should be delivered by Friday, but I cannot understand how it can take almost a month to get a parcel to be delivered. I will never recommend UPS!