Agent delaying delivery

Received a phone call and email from FedEx on Friday 04/09/2015 regarding a parcel for delivery. I paid the outstanding balance for the delivery and customs clearance and did sent the proof of payment through to Michelle on Monday morning 07/09/2015. She sent me another mail later the day asking for the money again,,,,??<br> Did sent the proof of payment to her and did reply to her second email. Up to now no response from her....??<br> <br> This is poor service from FedEx. Do not understand why customers pay extra money for speedy deliveries and if the agents working for the delivery companies are taking their time??????<br> <br> Will never make use of their service again!!