Poor Poor Service

This is probably my worst courier experience ever. I had a parcel shipped from Europe to South Africa that arrived in the country within 2 working days. I received a phone call and subsequent email to inform me that I needed to pay VAT and fees on the parcel before it would be delivered. I immediately made a credit card payment via the Supaswift (Fedex) website as per the instructions and emailed the agent that I was dealing with that payment had been made. Two days later the agent phoned me back to ask if I had made payment (clearly she doesn't read emails) and I told her that I had and was still waiting for my parcel to be delivered. She told me that she would follow-up with their accounts department and revert. It is now a week since I made the payment and my parcel still hasn't been delivered. I have since sent two follow-up emails to the agent with no response. I even tried calling the Supaswift (Fedex) call centre and dealt with a different person who said that she would expedite my query but I have still not received a response. I am extremely dissatisfied with the service that I've received and would advise against using Fedex as their customer service is a joke.