Poor costumer relations and feedback

I have an overseas parcel which I needed urgently, so i paid for it to be delivered by Fedex Express. I received an email to do the payment which I did. They said that due to their payment method not working properly for months I must email my proof of payment to *** which I also did. 3 days later and no parcel and neither did I hear from them that they received the pop or my email. this morning at 7H30 I called them and they requested that i send the pop once again. 7H45 they rep**** again via email that they have confirmed payment but that they will only deliver a day later as the vehicle has already left and that they are not going to send another vehicle. So the parcel stationary at the Johannesburg depot for 4 days without any person contacting me to say there was a problem. the previous time I could swipe my card as they delivered but this time payment was a problem.